When I try to install the PC4KGATE download I get not valid serial no. message. Can anyone give info on this. Thanks!

Are you using Run As Administrator to open the exe? Also be careful of mixing up zeros 0 and the letter O. If you are copying and pasting the registration number try typing it in manually. If you are typing it manually try copy pasting it. It should work after trying all that. If not give Cake a call and they'll hook you up. Cheers.

I've tried everything I can think of but no matter how I do it I get the "wrong serial no. message". I guess I go to support on this one.

Yeah, I think that just happens sometimes. Love the Cake but their servers are weird. Sounds like when this stuff happens they just issue new dl links or reg numbers and all is well. Hope it gets solved for ya. Cheers.