Here is the error from the server startup:
2010-12-30 09:00:57 [SEVERE] Exception while loading plugin
java.lang.NoSuchFieldError: COMPLEX_BLOCK_CHANGE
at Stargate.initializeExtra(Stargate.java:34)
at SuperPlugin.initialize(SuperPlugin.java:45)
at PluginLoader.load(PluginLoader.java:343)
at PluginLoader.loadPlugin(PluginLoader.java:290)
at PluginLoader.loadPlugins(PluginLoader.java:277)
at etc.getLoader(etc.java:271)
at ks.a(ks.java:185)
at ff.f(SourceFile:1400)
at fm.f(SourceFile:29)
at net.minecraft.server.MinecraftServer.h(SourceFile:271)
at net.minecraft.server.MinecraftServer.run(SourceFile:216)
at cj.run(SourceFile:490)

Running Server 1.1_02, Hey0 133
plugins=Stats,Achievements,LoginMessage,UpdatrPlugin,Flashlight,MinecartMania,Stargate

Stargate.jar is in the Plugins folder and it did create a stargate.txt in the bin folder.