asp.net 2005 (COM+ Activation failed because an initialization function failed. )

When i execute my code, it show me the error below. anyone can help me what is the error about..
thanks

Code:

COM+ Activation failed because an initialization function failed. Check the event log for more information. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: COM+ Activation failed because an initialization function failed. Check the event log for more information. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [COMException (0x8004e025): COM+ Activation failed because an initialization function failed. Check the event log for more information.] MapInfo.Engine.Session.Create() +252 MapInfo.Engine.ManualStateSessionActivator.OnBeginRequest(Object sender, EventArgs e) +172 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64