2300 MP no image from Dell C400 laptop

Hi,

 

I have an Dell 2300MP projector that works fine, except with certain laptops such as the Dell C400.

 

On a external screen, CRT or LCD everything works fine. But on the projector i cant get an image. With other laptops such as the D600, D610 and D620 the projector works fine.

 

I have tried to update the video drivers and i have tested it with several C400 notebooks bot nothing works.

 

As workarround i now use a port replicator, this is the only way i know of wich works.

 

Does anyone now a permanent solution to this problem?

 

Thanxs in advantage, Floris.