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i am also having a problem with ports. i swithced my server to another computer, it starts up and runs fine but it wont let me connect with my external ip. Can someone help me please?

--- BEGIN ERROR REPORT e01d5a70 --------
Generated 7/14/12 12:13 PM

Minecraft: Minecraft 1.2.5
OS: Windows 7 (amd64) version 6.1
Java: 1.7.0_05, Oracle Corporation
VM: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
LWJGL: 2.8.3
OpenGL: Mobile Intel(R) 4 Series Express Chipset Family version 2.1.0 - Build 8.15.10.2086, Intel

java.lang.NullPointerException
at fr.a(CraftingManager.java:176)
at ClientRegistry.addRecipe(ClientRegistry.java:20)
at cpw.mods.fml.common.registry.FMLRegistry.addRecipe(FMLRegistry.java:42)
at ModLoader.addRecipe(ModLoader.java:179)
at mod_AdvancedMachines.load(mod_AdvancedMachines.java:70)
at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)
at cpw.mods.fml.common.Loader.modInit(Loader.java:273)
at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)
at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)
at net.minecraft.client.Minecraft.a(Minecraft.java:429)
at net.minecraft.client.Minecraft.run(Minecraft.java:738)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 355cd52e ----------


Anyone help on how to fix this??:)