help, module dependency unresolved

Hi
I am trying with the 2.5.70 beta kernel. The compiling and installing
is OK. But
when calling "depmod -ae -b ... -F .. -r ..", the modules dependency and the function references were not resolved correctly. For example:
in module fs/vfat/vfat.o, many functions used were exported by
fs/fat/fat.o. But it
still complaint that the functions reference unresolved. There is not similar problem with 2.4.* kernel.

If you have met the same problem, could you let me know?

Thanks

-- Fronteer