ID Conflict SMP Only?

Hey guys,

Im new to this forum, and i realy like IC2. after played some hours single player i want to set up a server for me and my friends. But i got a problem. As soon as im putting the server jar into the mod file at the .minecraft file and start up minecraft i get the following error.

Mods loaded: 4
ModLoader 1.2.5
mod_MinecraftForge 3.1.3.107
mod_IC2 v1.95
mod_IC2 v1.95

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem.

--- BEGIN ERROR REPORT 5f7a9771 --------
Generated 14-5-12 18:42

Minecraft: Minecraft 1.2.5
OS: Windows Vista (x86) version 6.0
Java: 1.6.0_29, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: ASUS EAH4890 version 2.1.8781, ATI Technologies Inc.

java.lang.IllegalArgumentException: Slot 249 is already occupied by ic2.common.BlockTex@c639ce when adding ic2.common.BlockTex@1fd360b
at pb.<init>(Block.java:249)
at pb.<init>(Block.java:281)
at ic2.platform.BlockCommon.<init>(BlockCommon.java:12)
at ic2.common.BlockTex.<init>(BlockTex.java:30)
at mod_IC2.load(mod_IC2.java:154)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(RenderManager.java:86)
at ahu.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 5f401130 ----------

I tried to reeinstall everyting and tried to change id's but it all doesnt work for me. and single player still works if i just put away the ic2 server file from the mod map. I hope anyone got some suggestions for me to try, cause i realy like to play ic2 with some friends!

many thanks!

Didier

both of them are 1.95b, 1 is the server file and one is the client file in the mod file.

I can only find 1 mods folder, its at the .Minecraft folder. is that the client one or the server one?

Hmm i suck Still cant find the server mods file:(

Thank you verry much guys, i found out! you guys realy helped me to the right way!:) i got the server worked now! only massive lagg:( will fix it later but the start is here! thanks!