Server Error in '/' Application.

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Line 64:                         select temp;
Line 65: 
Line 66:             return query.ToList();
Line 67:         }
Line 68:     }

[Win32Exception (0x80004005): The wait operation timed out]

[SqlException (0x80131904): Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +2582782
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +6033430
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +297
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4291
   System.Data.SqlClient.SqlDataReader.TryReadInternal(Boolean setTimeout, Boolean& more) +389
   System.Data.SqlClient.SqlDataReader.Read() +35
   System.Data.Linq.SqlClient.ObjectReaderBase`1.Read() +48
   System.Data.Linq.SqlClient.ObjectReader`2.MoveNext() +16
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +246
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +61
   SiteBasic.getClassIdList(Int32 clsId) in c:\webhosting\data\App_Code\SiteBasic.cs:66
   new_dect.Page_Load(Object sender, EventArgs e) in c:\webhosting\data\En\new_dect.aspx.cs:32
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693