Linux Terminal Server Client Help
 

I am attempting to configure my lts.conf file problem is I cannot seem to get the X server up on any of the clients. All of the clinets have rivia 128 video cards one has a Gateway Vivitron 1776 Monitor another has a Dell Trinitron and another has a gateway EV700. I am unsure of how to configure this file for these monitors the error message i get when i try to use any of them is
(EE) No Devices detected

Fatal server error:
no screens found

Can anyone help with this