Port forwarding with Air Card AC313U

I have a soulution, with a problem.

I have an Cradlepoint MBR1200B, using a AC 313U connected, for an internet connection (works fine with PC, and VOIP phone system).

I need to have port forwarding enabled.

I have enabled the port forwarding through the Cradlepoint device correctly - no luck
I’m using AT&T, as my provider, no help there.
contacted netgear, not help there.
tried to access the AC by directly connecting to my PC, I couldn’t access it (maybe i didn’t do it correctly, not 100% about this one)

My problem is, I need TCP ports 4520-4524 and port 80, forwarded through, to allow a security system to be remotely accessed and controlled.

Bruce

Hi,
Since April 2013, all AirCard Mobile Broadband Devices are marketed, sold and supported by NETGEAR, Inc. Please consult support.netgear.com.

Regards,
Alex