Can't restore SQL Server 2008 db from VB.NET app

I have a VB.NET app that connects to a SQL db.  
I want to be able to create a backup, change the data and then restore the data to the pre-changed state.

I am able to create a backup file, but when I try to restore the file, I get the following error:
User does not have permission to RESTORE database 'MyDB'.
RESTORE DATABASE is terminating abnormally.

In SMSS I have given the application all permissions: (see image)permissions
I think I probably have to disconnect from the database 1st, but I'm not getting a "db in use error" just the permission error.

Here is the code I'm using in my VB.NET app for the restore.
RESTORE DATABASE MyDB FROM disk= '" & clsPublic.strPSCBakDir & 
lvFiles.FocusedItem.Text & "'  WITH MOVE 'MyDB ' TO 'C:\Program Files\Microsoft SQL 
'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\MyDB 

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the clsPublic and lvFiles.FocusedItem are just used to get the path and filename

thanks for any assistance
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Aneesh RetnakaranDatabase AdministratorCommented:
Why do you need to create another application for this (SSMS has this functionality). as far as permission is concerned, your application user must have sysadmin roles. also should have right to access the back up location and write permission on data drives.  
If some one else gets this application, you can imagine what's goanna happen  : )
PSCTECHAuthor Commented:
Thanks, the sysadmin seemed to get me past the error now I get:

RESTORE cannot process database 'MyDB' because it is in use by this session. It is recommended that the master database be used when performing this operation.
RESTORE DATABASE is terminating abnormally.

I assume that means I have to disconnect from MyDB from within the app.  What is the syntax for that?
Aneesh RetnakaranDatabase AdministratorCommented:
use  this 'use statement'

USE Master
Restore .. .

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PSCTECHAuthor Commented:
Great answer.  Very thorough and very fast response.  Solved my problem!
PSCTECHAuthor Commented:
Thank you, you saved my (_:_)!  The Use Master worked.  The go caused a syntax error (not sure why) but using just the Use Master fixed it!  Thanks again.
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Visual Basic.NET

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