Bruce61;
Since you didn't say what brand/model of remote you're using, maybe this list of advanced codes for a Cinema 7 by OFA will help:
Advanced Codes for One-For-All x-10 Home Automation

CD Group

Device Code 0167

HOME AUTOMATION:

Adv. Remote
Code - Button - X10 command
------- -------- -----------
655 1 1
397 2 2
398 3 3
652 4 4
334 5 5
588 6 6
591 7 7
333 8 8
463 9 9
717 0 10
718 REWIND 11
460 PLAY 12
526 FFWD 13
268 RECORD 14
271 STOP 15
525 PAUSE 16
558 POWER All Lights On
238 MUTE All Off
303 VOL UP Bright
495 VOL DN Dim

Put code 0167 on the CD key, or re-assign the the CD key: SETUP(2 Blinks) 992 (to this key) CD CD SETUP(2 Blinks)

For unit # 11 use the REWIND key on the Cinema7

Just a thought