Intermittent Problem with IIS

I get this error on some pages of my web site. But it never shows up in the same place. It's not the code it works fine. I am using server2003 and IIS6. Does anyone else get this intermittent problem. Also there are no errors in the logs. It's some kind of glitch.

Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

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:

[NullReferenceException: Object reference not set to an instance of an object.] Workgiant.Class1.getjobcategories() in c:\inetpub\wwwroot\Workgiant\Class1.vb:457 Workgiant.jobseeker5.Page_Load(Object sender, EventArgs e) in c:\inetpub\wwwroot\Workgiant\jobseeker5.aspx.vb:58 System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.Control.LoadRecursive() +35 System.Web.UI.Page.ProcessRequestMain() +731

Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573

I don't have any first-hand experience with IIS6. Is there anything helpful in the server event logs or the http logs?

www.iisfaq.com is a useful IIS site, maybe there is something there.

You might want to try the NET forum in case it's something code related.

There were no error logs or any other help with the problem i loaded .net 2.0 beta and everything is fixed now. It must have been the .net drivers.