Wifi card whiltelist removal Thinkpad Edge 13

I am looking for help in installing a dual band card in my Lenovo Thinkpad Edge 30 to replace the single band original.

Machine type == 0196 24U
BIOS == 6YET29WW ver 1.12

I purchased an approved Intel Wimax 6250 AGN card but after installing the laptop halts during POST with "unauthorized card" error.

Please let me know if you need any more info from me.

Thanks in advance for your help.