hv two slots in my samsung syncmaster s19b150 led monitor, first is RGB IN 15 pins female, and second is DVI IN 24+1 pins female. Want to use DVI socket to my PC which has only VGA connection. So I hv bought a male to male DVI cable 24+1 pins. Also bought a DVI Female to VGA Male converter. The converter is having DVI female of 24 + 5 pins. Connected the cable and converter, but msg on screen reads CHECK SIGNAL CABLE DVI. Help me out please....