exception in executing a stored procedure

Question

hi
I'm trying to execute a stored procedure which returns a datatable
my code is:

  try {

                string conStr = WebConfigurationManager.ConnectionStrings[0].ConnectionString;
                SqlDataAdapter adapter;
                DataTable ans = new DataTable();
                SqlConnection connection = new SqlConnection(conStr);
                SqlCommand command = new SqlCommand();
                command.CommandType = CommandType.StoredProcedure;
                command.CommandText = "usp_GetUserDetails";
 
                command.Parameters.Add("@UserName", SqlDbType.VarChar);
                command.Parameters.Add("@Password", SqlDbType.VarChar);
                command.Parameters["@UserName"].Value = user;
                command.Parameters["@UserName"].Direction = ParameterDirection.Input;
                command.Parameters["@Password"].Value = pass;
                command.Parameters["@Password"].Direction = ParameterDirection.Input;
 
                adapter = new SqlDataAdapter(command.CommandText, connection);
                adapter.Fill(ans);
 
                return ans; 
            }
            catch (Exception ex)
            {
                throw ex;
            }

try { string conStr = WebConfigurationManager.ConnectionStrings[0].ConnectionString; SqlDataAdapter adapter; DataTable ans = new DataTable(); SqlConnection connection = new SqlConnection(conStr); SqlCommand command = new SqlCommand(); command.CommandType = CommandType.StoredProcedure; command.CommandText = "usp_GetUserDetails"; command.Parameters.Add("@UserName", SqlDbType.VarChar); command.Parameters.Add("@Password", SqlDbType.VarChar); command.Parameters["@UserName"].Value = user; command.Parameters["@UserName"].Direction = ParameterDirection.Input; command.Parameters["@Password"].Value = pass; command.Parameters["@Password"].Direction = ParameterDirection.Input; adapter = new SqlDataAdapter(command.CommandText, connection); adapter.Fill(ans); return ans; } catch (Exception ex) { throw ex; }

when i execute i get an exception:
An attempt to attach an auto-named database for file C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\WebSites\WebSite1\App_Data\aspnetdb.mdf failed. A database with the same name exists, or specified file cannot be Opened, or it is located on UNC share.

the connection string is:

<add name="MainConnectionString" connectionString="Data Source=MIKLAT\SQLEXPRESS;Initial Catalog=...;Integrated Security=True; providerName="System.Data.SqlClient"/> 

<add name="MainConnectionString" connectionString="Data Source=MIKLAT\SQLEXPRESS;Initial Catalog=...;Integrated Security=True; providerName="System.Data.SqlClient"/>

I'm not running this site from iis, just from visual studio 2008.
the database is located in c:\program files\sql 2005 ....

i tried to look for a solution but didnt find something helpfull.