Flash_hsalF

I installed forge and optifine, and it only worked for a second before crashing, and now I can't get on. Any help? --- BEGIN ERROR REPORT a3b62f81 -------- Generated 27/08/12 05:10 - Minecraft Version: 1.3.2 - Operating System: Windows XP (x86) version 5.1 - Java Version: 1.7.0_03, Oracle Corporation - Java VM Version: Java HotSpot Client VM (mixed mode), Oracle Corporation - Memory: 406787504 bytes (387 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB) - JVM Flags: 2 total; -Xms512m -Xmx1024m - Is Modded: Definitely; 'forge,fml' - Profiler Position: N/A (disabled) - Player Count: 1 / 8; [gu['Flash_hsalF'/109, l='New World', x=-657,30, y=14,36, z=-288,00]] - World New World Entities: 0 total; [] - World New World Players: 0 total; [] - World New World Chunk Stats: ServerChunkCache: 0 Drop: 0 - Type: Integrated Server java.lang.NullPointerException at Reflector.callInt(Reflector.java:214) at jw.d(EntityLiving.java:1030) at jw.a(EntityLiving.java:882) at um.a(Explosion.java:126) at gr.a(WorldServer.java:827) at up.a(World.java:2391) at nl.d(SourceFile:83) at nl.h_(SourceFile:73) at up.a(World.java:2022) at gr.a(WorldServer.java:538) at up.g(World.java:1986) at up.h(World.java:1867) at gr.h(WorldServer.java:437) at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:616) at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:547) at axv.p(IntegratedServer.java:102) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:453) at ep.run(SourceFile:539) --- END ERROR REPORT 5c4a1c5c ----------

Ok, sorry if this has been answered before but I don't know quite understand something, I already have modloader, optifine, TMI...etc. I have never used forge before so do I need to delete my current jar file and install it all again with forge, or can I simply install forge on top of all that?