delete LAN driver not working

Hey,

I installed ALXEthernet-v1.0.2.pkg and when I now want to remove it, it doesn't work, LAN is still working.

I tried to delete /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/ALXEthernet.kext

but there is no effect. I also tried to kextunload the file, then my system automatically rebooted / crashed...