Please Help! Dualview resolution limit

I have a 7300 LE card, set with dualview for a 22" and a 17" monitor.

The 17" is set to 1280x1024 32bit.

The 22" can do on its own 1920x1200 32 bit.

But in dual view it will only do 16 bit. I can get 32 bits by lowering the resolution to 1680x1050.
but I can't get 1920x1200 32bit.


Is this the limit of the card or is something else wrong?

Thanks![#ff4600][/#ff4600]

sorry. I am confused/ing. it is 24" not 22", native res 1920x1200. It is a BenQ FP241w.

It works at that resolution perfectly, but the color depth is limited to 16 bit when in dualview.