Android : Failed to find symbols in Android kernel

I am using Android ICS with Linux kernel 3.0.35. To provide NL80211 support ,I enabled the CFG80211 in make menuconfig to built as Module. I am getting cfg80211.ko under kernel_imx/net/wireless folder.

I am inserting the cfg80211.ko module followed by wifi driver files .

But when inserting the cfg80211.ko file I am getting the following error .

Failed to find symbol __cfg80211_auth_canceled

Failed to find symbol __cfg80211_send_deauth

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Failed to find symbol cfg80211_wext_siwmode

cfg80211: Calling CRDA to update world regulatory domain

Has anyone come across this error ?........