Hi,
Did a quick search and found these as possible solutions...
Turn to channel 38, and hold channel+ and volume- for 3 seconds
...or...
Turn to channel 38, then press "CONTROL +" & "STORE" keys simultaneously.
The link to the page is
http://www.remotecentral.com/cgi-bin/mboard/rc-custom/thread.cgi?383
And they may have further advice there.
Good luck!