You've hit upon the problem! *Somewhere* (not UBB) I had read that you should change all your .cgi extensions to .pl for security. I had only changed the cp.cgi.
But if I change cp.pl back to cp.cgi now, I can't even see the first page of the control panel. If I change it back to cp.pl I can see the first page, but not subsequent. Would you suggest I change all .cgi entenstions to .pl, or find out where I have something set to allow me to see .pl but not cgi?
Thanks for helping this newbie!