sking

I have been having bunches of problems with my FS2004 recently. I've had to reinstall it numerous times to no avail. It will hang after pressing the ok button and never go to flight mode. I've experimented and have deleted various programs such as FS navigator, FS Flightkeeper etc and have come to a conclusion that FSUIPC 3.30 is the culprit. When I delete the file it works fine but of course nothing else will work with out it. When I put it in there it just hangs and will never go to flight mode. I am registered with it infact twice to be exact. I can't get my sim to work in order to register it with the code. Does anyone have any ideas in why it's not working? I'd surely appreciate any help. Thanks. Scott K. PS sorry for the rambling above.