My mod has no error or warning during compiling.But when I "insmod hello.o" , it shows:
   hello.o : unresolved symbol TaskStart
   hello.o : unresolved symbol TasksLoadImage
   hello.o : unresolved symbol TasksInitAPI
   ...
What's the problem?

You're trying to insert a module that depends on another
module/functionality in the kernel but which you did not insert or
compile in the kernel.

-- 
  greetz, marc
We can stick our heads between our legs and kiss our asses goodbye. It's
a saying.
	Crichton - I, E.T.
scorpius 2.6.12 #1 Thu Jun 23 21:32:03 CEST 2005 GNU/Linux