[HELP] Can't Attach Database

Hello guys i got problem with my Private Server.. I can't attach DataBase .. Look at screen :)
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That isn't the error that will help us knowing what your problem is, click on the link of the error itself and read what error code you get, then, if you are not able to find the solution, post it in here and we will help

#Moved to the right section

some db´s just go with a special sql version idk which files u use and from who if u would post that we may could help u more. i had that prob aswell and had to upgrade my 2008r2 to 2012.

Not really a "special" one, they can run on the version in which they were created, or later, yet that is just an assumption as we are not been given the actual error code; as this could be even a problem with the credentials of the user that is being used to attach the database files, as well as many other common issues.