Hmmm, not too sure what the problem is. I have the latest remote for the phase 3 and it worked for me. Check for your remote here:
If you have a different remote from that list, you might try plugging in other codes for the Motorola box from the manual and see if that fixes things. (I would try working backwards from the 1376 code). If it doesn't then maybe the remote is defective and needs replacing.