i've installed with iPC 10.5.6 universal Nvdarwin 512 but it doesn't work..

i've managed to install it with 9800gtx nviject and it works, but not on 1680x1050.. when i set this up the screen turns blue.. and nothing happens..

i have QE and CI enabled but cant get it to 1680x1050.. it runs on 1400 or something
does somebody know how to fix this ?

thanks!