When i try to open or edit the properties of a user on a SBS 2003 server, the User-properties dialog box flashen in the screen and disapears inmediatly without any errors.

I open the dialog box this way: Active Directory Users and Computers, Domain.local, Mybusiness, Users, SBSusers, right click on a user, properties.

The dialog box does not appear, so i'm not able to edit anything

Anyone an idea how to repair this?

Thanks for thinking!!