New Post: Error occurs when build project

I'm running the latest version of the solution in VS2012 as an administrator.
How to deploy a database?
I attached the database BugNET.mdf in MSSQL 2008, but Database.mdf without log is not attached.
I recompiled solution.
Then I have error when starting app in browser - couldnt connect to database.
Help, please.

Exception information:

Source Error:

Line 225: {
Line 226: sqlCmd.Connection = cn;
Line 227: cn.Open();
Line 228: gcfr(sqlCmd.ExecuteReader(), ref list);
Line 229: }

System.Data.SqlClient.SqlException is not handled by user code
HResult=-2146232060
ErrorCode=-2146232060
Class=11
LineNumber=65536
Number=4060
Procedure=""
Server=.\SQLEXPRESS //there is incorrect instance name, I attached db in other
Source=.Net SqlClient Data Provider
State=1
Message=Couldnt open database "BugNET", with current login. Cannt enter.
User enter error "PCNAME1\Username".
StackTrace:

   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at BugNET.Providers.DataProviders.SqlDataProvider.ExecuteReaderCmd[T](SqlCommand sqlCmd, GenerateListFromReader`1 gcfr, List`1& list) in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\Library\Providers\DataProviders\SqlDataProvider\SqlDataProviderHelpers.cs:line 227
   at BugNET.Providers.DataProviders.SqlDataProvider.GetHostSettings() in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\Library\Providers\DataProviders\SqlDataProvider\SqlDataProvider.cs:line 346
   at BugNET.BLL.HostSettingManager.LoadHostSettings() in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\BugNET.BLL\HostSettingManager.cs:line 123
   at BugNET.BLL.HostSettingManager.GetHostSettings() in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\BugNET.BLL\HostSettingManager.cs:line 108
   at BugNET.Initialization.Init(HttpContext context) in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\BugNET_WAP\Global.asax.cs:line 128
   at BugNET.Global.Application_BeginRequest(Object sender, EventArgs e) in c:\Users\Username\Desktop\BugNET-1.3.242-Source\src\BugNET_WAP\Global.asax.cs:line 71
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

InnerException: