Motorola GP600 programming Please HELP

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Hello,
sorry for my bad english. I am German !

I hope anyone can help me. I have buy an motorola GP900 Radio.
Now i have a RIB board attached and i use the DPS software 00.04.07

The connection between my PC and my Radio work fine, but i can´t programm any channel.
I have read that is a "Trunking" model, but i want to programm 2 conventional channel.

I read that i can programm up to 4 conventional channel.

But, it does not work.

-I read the data from the radio
-Then i go to the menue EDIT/CONVERSIONAL PERSONALITY DATA

The i see one frequency (420,00000) set to Channel 16.
I can´t edit it and i cant Add another channel. The program say that is incombatible!

Thanks,
Michael