Foreign import

Hi, I'm a new ffi user and I have some problems with foreign import declaration. I'm don't have any problem to access C standard functions. However, I cannot access to my own functions in mylib.h by means of foreign import "mylib.h myfun" hmyfun :: ... May be I'm omitting some compilation step or parameter also, since I'm applying the same compilation process to call C standard functions. I'm working with ghc 5.04 on SuSe Linux 7.0. Any help will be welcome. gustavo