Active Camera question

I know that this is not the AC forum but the link to that forum on the AC site seems to be not working.I reinstalled FS on a new system recently, and installed and registered AC. When I go to VC view and press num-key 2 (used to walk backwards), all I get is a switch to the rear view, as if no modification of the key function had occured at all.I recall having some trouble like this years ago, and recall its something very simple that I'm not doing. I haven't modified the keys at all in activecamera.cfg. Thanks for any help,Bruce.