[HELP] Banned on WZ Infected

Hi all
I got banned off WZ infected server on IW4m Lastest client.
I am not banned from iw4m.
I created a new account anyway, changed my ip and cleared my cache etc.
So my name is different and my ip is different but everytime i join i get "Player Kicked~"

Then I followed some threads here and other forums for spoofing mac address. I used 3 software SMAC TMAc etc and spoofed my mac but still player kicked (banned) from server.

Anyone know what it is they have on me to ban? Its not my ip is it still my Mac?
If I spoof my mac how can they still kick?
Is there any tmp or dump files in iw4m folder that they save or how can I get into the server?

Thanks in advance for any replies

Or maybe a subnet ban? WZ subnet banned my whole country