1.5 Vanilla+Forge Won't Start

[stirfry213]

I'm using the vanilla 1.5 minecraft_server.jar to create the initial files.  Then I copy in the minecraftforge-universal-1.5-7.7.0.583.zip to the same directory and rename it to .jar.  Finally, I modify the run.bat file for the new forge file name.  This worked just fine for 1.4.7 and is in the directions on the wiki.  Now I'm getting the error below.  What mistake am I making?  I'm sure it's a noob mistake, please don't flame me! lol

 

C:\Users\stirfry213\Desktop\bf15>java -Xmx1024M -Xms1024M -jar minecraftforge-univers

al-1.5-7.7.0.583.jar nogui

Exception in thread "main" java.lang.NoClassDefFoundError: ab

        at java.lang.ClassLoader.defineClass1(Native Method)

        at java.lang.ClassLoader.defineClassCond(Unknown Source)

        at java.lang.ClassLoader.defineClass(Unknown Source)

        at java.security.SecureClassLoader.defineClass(Unknown Source)

        at java.net.URLClassLoader.defineClass(Unknown Source)

        at java.net.URLClassLoader.access$000(Unknown Source)

        at java.net.URLClassLoader$1.run(Unknown Source)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

Caused by: java.lang.ClassNotFoundException: ab

        at java.net.URLClassLoader$1.run(Unknown Source)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

        ... 12 more

Could not find the main class: net.minecraft.server.MinecraftServer. Program wil

l exit.

 

C:\Users\stirfry213\Desktop\bf15>PAUSE

Press any key to continue . . .