The database in my application becomes read-only after i install

I've created a project in VB .NET. when i build it and run the .exe everything works fine but when i install it the database becomes read only. I've used the VB 'setup and deployment' project to make and installer and i also tried InstallShield but the occurs in both cases. i looked on google but can't find anything that makes sense atleast. i think the application can not create _log.LDF file. Anyone come across this problem before?

error:
System.Data.SqlClient.SqlException: Failed to update database "C:\........." because the database is read-only.

How are you accomplishing the "install" of the database?

DO you mean you are installing a vb app, and then Attaching a database to an existing SQL Server installation? Or is installing SQL Server part of your application SetUp?

I have found that when I attach a database file created on a different installation of SQL Server, the database attaches, but is read-only. I have to manually change it to read-write in the properties window of SSMS.

I am not well-enough versed in the intricacies of this, but I imagaine there is some SQL code one might execute after attaching a databse to reset this property.