Is that during the install process, or are you are trying to open an existing Money file. If you don't have the right login credentials, you may be out of luck.
It is also posible that the *.mny file is damaged, and that your newest or second-newest *.mbf (Money Backup File) may be what you need to get going.
See if you can copy Sample.mny from the install folder, and see if you can open that.
I suggest that you consider installing the Microsooft Money Sunset version and using that. Your Money 2007 would be expired for online access anyway.