Proto GP-7 Problem

[snick]

Hi,
I have a Proto GP-7 DCC with sound. I use a MRC Prodigy DCC System. The engine runs foward in reverse and reverse in foward. I know there is a way to change the direction of the loco, but I don't remember which cv it is. Can anybody help me???
Snick

 

[Gary Pfeil]

I'm pretty sure its cv29, add 1 to whatever value it has in it now.