AJAX TaskList example and ASPNETDB.MDF

I have downloaded and installed ASP.NET Ajax Sample applications from

http://ajax.asp.net/default.aspx?tabid=47&subtabid=471

I am trying to run the AJAX TaskList example under C:\Program\Microsoft ASP.NET\ASP.NET AJAX Sample Applications\v1.0.61025\TaskList

First I moved the content of the TaskList folder to a virtual IIS directory, making it possible to debug the website on my local IIS server.

When I run the example I get prompted to Login or register as a new user. When I submit the registration form I receive the following error message:

Failed to update database "C:\INETPUB\WWWROOT\TASKLIST\APP_DATA\ASPNETDB.MDF" because the database is read-only.

I would appreciate some assistance. Is it possible for me to change the permissions forASPNETDB.MDF in order to run the TaskList example?

Thanks

Additional information:

I have installed SQL Server Management Studio Express as I figured this tool might help me to change the permissions. It did not help. I also tried to delete ASPNETDB.mdf, and recreate it by going Website -> Asp.net configuration by adding a new user. I still receive the same error message.

When I point the connection string to a remote SQL database of mine it is possible to register users in ASPNETDB.mdf. But I havn't figured out how to add users using a local version of ASPNETDB.mdf.

I am running Visual Studio on Windows XP. In windows XP you can't just modify permissions for folders as far as I know. I have recently installed SQL Server Management Studio Express as I said before.

I read somewhere that the read/write property for ASPNETDB.mdf may be enabled by checking a box somewhere.

But in SQL Server Management Studio Express tried the following:

*Right click on databases and click attach

*Click Add and select the database ASPNETDB.mdf

*Click OK

*Right Click on the path for ASPNETDB.mdf and click properties

When I click 'Options' under select a page Database Read-Only is already set to false.

If there is no way to use a local version of ASPNETDB.mdf (located to the App_Data folder) I simply have to put up with my remote MS SQL 2005 database. But the subscription fee for this database is outrageous, and therefore I hope that someone might help me and everyone else by providing the appropriate steps to use ASPNETDB.mdf located to the App_Data folder.

Thanks
Svenbro