Hello @Harriet59 ,

This could be what we might call a "realm" issue. 

There is a file in ProSeries I want you to find and rename. Its called Olac.ini, and its located (most likely) in the C:\BasWin22\common folder. 

Shut down your Basic product

Rename it to something like Olac.ini.old and restart ProSeries. It will have to re-build that file with login information. 

Hope this helps.