I had that exact problem except that it never let me in from the get go. I need to first know what version of Windows you have. Myself I had Windows 98 1st edition. Yes there has been a second edition put out and that was my problem. Realflight is supposed to have a patch built into it that will allow it to run on 1st edition but that patch does not work. I read a few messages here and decided to upgrade to 2nd edition. Luckily my Dad manages a computer store so I had no cost. At any rate that fixed my problem. If you are running Windows 98 you have to have second edition for it to work.