error inserting a module in Linux -1 Device or resource busy

error inserting a module in Linux -1 Device or resource busy

When I try to insert the module (ecryptfs.ko), I get the following error:
insmod: error inserting './ecryptfs.ko': -1 Device or resource busy
My linux kernel version is 2.6.39.4 and the source of ecryptfs is the part
of it. Could some one please help me out?
below is the dmesg
[ 58.976395] Failed to register filesystem