Trying to connect a computer to a panasonic projector. I have a monoprice 50 ft vga vga cable but the colors are very washed out. Lots of blues not much red. Just not a good picture. When I connect the computer with the 6 ft cable (sitting on a ladder under the projector) everything works fine. Would seem that the inexpensive cable causes this. Is it possible to buy an amplifier of some kind? Should I buy a better cable? Where? How much should a cable cost that would fix this problem. I see Monster cables in the stores but their web site had no long cables. Could someone recommend a good source?