The only mod I'm trying to install right now is Forge, nothing is in my mods or coremods folders. For some reason it gives me an error message when I load the game and it begins to download the rest of the necessary files.
ForgeModLoader-client-0:
2013-03-15 18:37:16 [iNFO] [ForgeModLoader] Forge Mod Loader version 5.0.24.582 for Minecraft 1.5 loading
2013-03-15 18:37:16 [FINE] [ForgeModLoader] Enabling runtime deobfuscation
2013-03-15 18:37:16 [FINEST] [ForgeModLoader] All core mods are successfully located
2013-03-15 18:37:16 [FINEST] [ForgeModLoader] Discovering coremods
2013-03-15 18:37:16 [FINEST] [ForgeModLoader] Found library file argo-small-3.2.jar present and correct in lib dir
2013-03-15 18:37:16 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/guava-14.0-rc3.jar
2013-03-15 18:37:16 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/guava-14.0-rc3.jar
2013-03-15 18:45:12 [FINEST] [ForgeModLoader] Download complete
2013-03-15 18:45:12 [iNFO] [ForgeModLoader] Download complete
2013-03-15 18:45:12 [FINEST] [ForgeModLoader] Library file guava-14.0-rc3.jar was downloaded and verified successfully
2013-03-15 18:45:12 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/asm-all-4.1.jar
2013-03-15 18:45:12 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/asm-all-4.1.jar
2013-03-15 18:46:00 [FINEST] [ForgeModLoader] Download complete
2013-03-15 18:46:00 [iNFO] [ForgeModLoader] Download complete
2013-03-15 18:46:00 [FINEST] [ForgeModLoader] Library file asm-all-4.1.jar was downloaded and verified successfully
2013-03-15 18:46:00 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar
2013-03-15 18:46:00 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar
2013-03-15 18:54:21 [FINEST] [ForgeModLoader] Download complete
2013-03-15 18:54:21 [iNFO] [ForgeModLoader] Download complete
2013-03-15 18:54:21 [FINEST] [ForgeModLoader] Library file bcprov-jdk15on-148.jar was downloaded and verified successfully
2013-03-15 18:54:21 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/deobfuscation_data_1.5.zip
2013-03-15 18:54:21 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/deobfuscation_data_1.5.zip
2013-03-15 18:54:32 [FINEST] [ForgeModLoader] Download complete
2013-03-15 18:54:32 [iNFO] [ForgeModLoader] Download complete
2013-03-15 18:54:32 [FINEST] [ForgeModLoader] Library file deobfuscation_data_1.5.zip was downloaded and verified successfully
2013-03-15 18:54:32 [FINEST] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/scala-library.jar
2013-03-15 18:54:32 [iNFO] [ForgeModLoader] Downloading file http://files.minecraftforge.net/fmllibs/scala-library.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] There were errors during initial FML setup. Some files failed to download or were otherwise corrupted. You will need to manually obtain the following files from these download links and ensure your lib directory is clean.
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/argo-small-3.2.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/guava-14.0-rc3.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/asm-all-4.1.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/bcprov-jdk15on-148.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/deobfuscation_data_1.5.zip
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] *** Download http://files.minecraftforge.net/fmllibs/scala-library.jar
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] <===========>
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] The following is the errors that caused the setup to fail. They may help you diagnose and resolve the issue
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] java.net.SocketException: Connection reset
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] <<< ==== >>>
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] The following is diagnostic information for developers to review.
2013-03-15 18:56:33 [sEVERE] [ForgeModLoader] Error details
java.lang.RuntimeException: java.net.SocketException: Connection reset
at cpw.mods.fml.relauncher.RelaunchLibraryManager.performDownload(RelaunchLibraryManager.java:577)
at cpw.mods.fml.relauncher.RelaunchLibraryManager.downloadFile(RelaunchLibraryManager.java:512)
at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:164)
at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:169)
at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:256)
at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
at net.minecraft.Launcher.replace(Launcher.java:143)
at net.minecraft.Launcher$1.run(Launcher.java:87)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.MeteredStream.read(Unknown Source)
at java.io.FilterInputStream.read(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source)
at cpw.mods.fml.relauncher.RelaunchLibraryManager.performDownload(RelaunchLibraryManager.java:555)
... 8 more
2013-03-15 19:39:55 [iNFO] [sTDERR] Exception in thread "Thread-5" java.lang.RuntimeException: java.lang.RuntimeException: A fatal error occured and FML cannot continue
2013-03-15 19:39:55 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:189)
2013-03-15 19:39:55 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.relaunchApplet(FMLRelauncher.java:256)
2013-03-15 19:39:55 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.appletEntry(FMLRelauncher.java:226)
2013-03-15 19:39:55 [iNFO] [sTDERR] at net.minecraft.client.MinecraftApplet.init(MinecraftApplet.java:25)
2013-03-15 19:39:55 [iNFO] [sTDERR] at net.minecraft.Launcher.replace(Launcher.java:143)
2013-03-15 19:39:55 [iNFO] [sTDERR] at net.minecraft.Launcher$1.run(Launcher.java:87)
2013-03-15 19:39:55 [iNFO] [sTDERR] Caused by: java.lang.RuntimeException: A fatal error occured and FML cannot continue
2013-03-15 19:39:55 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.RelaunchLibraryManager.handleLaunch(RelaunchLibraryManager.java:260)
2013-03-15 19:39:55 [iNFO] [sTDERR] at cpw.mods.fml.relauncher.FMLRelauncher.setupHome(FMLRelauncher.java:169)
2013-03-15 19:39:55 [iNFO] [sTDERR] ... 5 more