I have changed the structure of one table.
I have look at the database explorer for datas. I get the error:
Can't open table Table not in connection. Table = au_kalk (352), Source = MSSQLDRV.Open
for all tables of the database?

I can see all the data inside the SSMS and also the connection ID ist right.
I can login with the connectionID.

I don´t know what I have done?