Mac mini no DVI support?

Hi everyone,

I purchased a Mac Mini two years ago and for some reason it would never support a display through a DVI connection (to mini display). The machine would boot, the display would come on and show "no signal going to sleep" message and go to sleep. I switched my monitor to VGA to mini display which has worked fine ever since. However, this past week I purchased a Wacom Cintiq 22HD which has a built in DVI cable. I've connected it to a display splitter with an adapter for DVI to VGA, attempting to have a dual display with my previous montior and the Cintiq.

It looks like the mini is still reading it as a DVI because it's still giving me the "no signal going to sleep" message and it goes to sleep.

Cintiq drivers are installed.

I'm running Mac OS X 10.6.8

Model Name: Mac mini

Model Identifier: Macmini4,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.4 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache: 3 MB

Memory: 2 GB

Bus Speed: 1.07 GHz

Boot ROM Version: MM41.0042.B00

SMC Version (system): 1.65f2

There must be another work around for this and I have found no reason why the mini should not support a DVI display?

Thanks for any info,

Emily