SQL Express problem

I've got a new installation of SQL Express 2012. When I try to create a new database I get the error message:

Index was outside of the bounds of the array. We get the message when we try to restore a database also.I'm using windows authentication. I've gone in as sa an given the user all possible rights.

Any ideas? Thank you.
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Deepak ChauhanSQL Server DBACommented:
Right click on ssms and run as administrator.
mfonyAuthor Commented:
I'm using SQL 2005 Server Management Studio to access the Express server. How would we go about doing that?
Deepak ChauhanSQL Server DBACommented:
In this case you can not do, you have to install SSMS 2012 client tool.

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Vitor MontalvãoMSSQL Senior EngineerCommented:
In the SQL Server 2012 Express download page you can chose only to download the correct version of SQL Server Management Studio.
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