Dear keee2k,
It is now becoming more unclear where the fault can be, perhaps if you are in the possibility. I would advise starting completely with a fresh start also MSSQL.
And perhaps when you are not committed to MSSQL you can use PostgreSQL. In my experience, it is more simple to use.
You can find the log files in the following folder on your machine:
C:\MagicInfo Premium\runtime\logs
C:\MagicInfo Premium\tomcat\logs
I hope this will help you.
Kind regards, Pepijn.