Connect NGAGE to C600?

[Guest stargate]

Has anyone managed to connect another bluetooth phone to a Windows Smartphone? I am trying this out with a C600 and a Nokia nGage. Everything connects ok, at the services window, the C600 finds COM Port and I check it. So far so good. Now, when I want to send some AT commands from a .NET application from the C600 to the defined incoming port I get no answer. After sending the AT command sequence, the nGage asks me for permission to connect and then nothing happens. I tested the .NET application directly from my desktop PC on the nGage connected as a bluetooth modem and it works perfectly. Is there anyway to force Windows Mobile to see the nGage's GSM modem?