[Buildroot] build root destroy the lib!

[thomas.luo]

hi, all
  i meet some strange things. the buildroot tools destroy the lib which i copyed in.

i use the make modules_install copy all the modules to the build_arm/root folder.and type
make in the buildroot.

the modules file is be smaller!!

who can help me?

Dec 31 17:01:57 modprobe: WARNING: Error inserting snd_ac97_bus (/lib/modules/2.6.19/kernel/sound/pci/ac97/snd-ac97-bus.ko): Invalid 
module format


Br
Thomas