Deploying SQL Express Database Files With ClickOnce App Using OLE

I've written a ClickOnce app that deploys a Sql Server Express data file (.mdf) and log file (.ldf) along with the other application files. SQL Express SP2 is a prerequisite for this app. After the applicaiton installs and starts up it copies these files to a specific folder and attaches them by calling the AttachDatabase() method of a Microsoft.SqlServer.Management.Smo.Server object.

This method works fine using Windows XP, however when I run it on Windows Vista I get the following exception:

Microsoft.SqlServer.Management.Smo.FailedOperationException: Attach database failed for Server 'localhostSQLEXPRESS'. ---> Microsoft.SqlServer.Management.Common.ExecutionFailureException: An exception occurred while executing a Transact-SQL statement or batch. ---> System.Data.SqlClient.SqlException: Unable to open the physical file "C:WashMasterDatabasewasshmaster.mdf". Operating system error 5: "5(Access is denied.)".

This exception occurs when I try to programmatically attach the database.

I've searched through the MSDN forums for a solution and I've only found two suggestions:

1.) Create all database connections using a User Instance.
2.) Create the database (using SQL) in the target folder, rather than copying it over from the deployment folder.

I don't like the idea of using User Instances because my entire data access layer is currently written using Ole and I would rather not rewrite it if I don't have to. I cannot find any way to use User Instances with Ole.

I also don't like the idea of creating the database using SQL because it is fairly large.

Here are my questions:

1.) Can User Instances be used with Ole?

2.) Can I somehow programmatically set the permissions of the copied data and log files so that SQL Express can access them without error?

3.) Is there a better method for doing what I'm trying to do or am I destined to have to either rewrite in data access layer so I can use User Instances or create my large database rather than copy it to the target directory?

Thanks.