D5m camera on DE1 board screen is gray!! help!

Hello i started my project and i use D5m camera, DE1 board. i use in CD's demo and connect D5m on DE1.

i put on program on de1 board and push key3. but there is problem connected vga cable monitor's screen is gray scale picture.

i want to see true color RGB's picture but there screen gray scale.

i don't modified demo source..

plz help me... i don't know what's wrong