Hi,
I have an application which was working fine then all of a sudden my users
are getting my custom error page. When I check the event log on web Server I
see

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 1/31/2007 1:23:08 PM
Event time (UTC): 1/31/2007 6:23:08 PM
Event ID: 07e688eeb1614408ad39b600cfd3e3d9
Event sequence: 8
Event occurrence: 1
Event detail code: 0

Application information:
   Application domain: /LM/W3SVC/1/Root/myapp-1-128147413814374195
   Trust level: Full
   Application Virtual Path: /myapp
   Application Path: D:\Sites\Beta\myapp\
   Machine name: servername

Process information:
   Process ID: 8860
   Process name: w3wp.exe
   Account name: NT AUTHORITY\NETWORK SERVICE

Exception information:
   Exception type: ArgumentNullException
   Exception message: Value cannot be null.
Parameter name: value

Request information:
   Request URL: http://beta/myapp/Default.aspx
   Request path: /myapp/Default.aspx
   User host address: 1.1.1.1
   User: DOMAIN\username
   Is authenticated: True
   Authentication Type: Negotiate
   Thread account name: NT AUTHORITY\NETWORK SERVICE

Thread information:
   Thread ID: 1
   Thread account name: NT AUTHORITY\NETWORK SERVICE
   Is impersonating: False
   Stack trace:    at System.Web.Caching.CacheEntry..ctor(String key,
Object value, CacheDependency dependency, CacheItemRemovedCallback
onRemovedHandler, DateTime utcAbsoluteExpiration, TimeSpan slidingExpiration,
CacheItemPriority priority, Boolean isPublic)
  at System.Web.Caching.CacheInternal.DoInsert(Boolean isPublic, String
key, Object value, CacheDependency dependencies, DateTime
utcAbsoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority
priority, CacheItemRemovedCallback onRemoveCallback, Boolean replace)
  at System.Web.Caching.Cache.Insert(String key, Object value,
CacheDependency dependencies, DateTime absoluteExpiration, TimeSpan
slidingExpiration)
  at Controls_Queue.Page_Load(Object sender, EventArgs e)
  at System.Web.UI.Control.OnLoad(EventArgs e)
  at System.Web.UI.Control.LoadRecursive()
  at System.Web.UI.Control.LoadRecursive()
  at System.Web.UI.Control.LoadRecursive()
  at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


Custom event details:

For more information, see Help and Support Center at

The default.aspx page has one control on it. This is the entry code for that
control

Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Load

           
       _list = GetUserLocaations()

             For Each l As String In _list
               drpLocation.Items.Add(l)
           Next
             
   End Sub

please assist