Problem with guages

I have a 04 gtp. I recently installed a aftermarket headunit, amp, and subs. Since then every now and then my tach, fuel, temp, and traction control quit working. They come back after a little while, but the traction control stays off. Pushing button does not turn it back on. Also display won't show date anymore.

you do realize that the 04 and up models require you to reolocate the factory head unit, dont you?