PS3 @ computer monitor

[moira]

x-post from video-games:
hey, I have linked my PS3 directly (not over a digital receiver) to my dell 30'' monitor via a hdmi-dvi-wire and its not working.
the ps3 works with my tv and the monitor works with my computer.
I also tried resetting the ps3 (by pressing on/off for 10secs) and its still not working.
the monitor just stays black. although it must receive some sort of signal, because when the monitor is "just" on, the sign is red and when I turn on the ps3 it turns blue.
has anybody succesfully done this before/knows help?
thx...