Try this: Hold down OPT while powering on the radio to put in in program mode,
Or just hold down the "OPT" key for about 1-2 seconds until it displays Programing.
On an Alpha head, it's the button just to the right of the channel selector knob.
One of the above works on a TK-830 (the UHF cousin) - I just can't recall exactly.
If you don't get the prob solved, post a question at this forum:
The Radio Information Board Forum > Kenwood Commercial Products
http://radio.the161.net/viewforum.php?f=9
there are several active threads dealing with that model,
and the folks there are VERY helpful.
Come back and post what you did when successful.
Good luck!