>>So, I went and deatach the database. But where it is now? It was called Credit and I can not find it now on my drive.
>Your database don't figure into your Database tree at your SQL Enterprise Manager, but they are safe, you now only have your Separates MDB y .LOG files. Usually they are at (HOME(SQLServer)+"MSSQL\Data\YourData.MDF". To see it at your manager you have to Attach it again.

Right, my problem was that I could not find the physical location of it and it was a terrifying moment. But I found it already after I've checked the script, I've generated earlier.

And I've just attached it back.