R514 - FC shows no Dialog to give Username and Passwort

[HeiWoMa]

Hi,
I have a mapped Network Drive which is mapped as Z:\.
Restart Computer and start FC -> click on Z: -> get a Error-Message that the path is not available.
I would aspect a Dialog to give my Username and Password like the WindowsExplorer does.
Same happens also when my last path in FC was e.g. \\Server. Then I also get an Error-Dialog instead of a Dialog to give Username and Password after restart the computer and start FC.