.NET Framework Data Access and Storage
is "asmt_admin" local or domain user
Is this a Windows Forms or a Web application
Let's see your ConnectionString.
Note that you can connect to a SQL Server using Windows authentication (Integrated Security=SSPI) or SQL Server authentication (where you provide a hard-coded UID and PWD). In an ASP application if you use SSPI authentication, you need to setup rights for the IIS account (which vary based on the version of IIS). IIS 7 uses IUSR_<machinename> so you need to grant rights to the target database using SQL Server Management Studio (Express). If you've configured SQLEXPRESS to permit SQL Server (mixed mode) authenication, you need to create a user account and (again) grant rights to the target database.
See Chapter 9 of my book or get started with the whitepaper on connecting on my blog. www.betav.com/blog/billva
hth