I got this error a few hundred times on my server today over a few hours. No one was able to use the chat until i restarted the application on iis. Can you tell what caused the error?

 

Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date:  6/4/2007
Time:  8:12:05 PM
User:  N/A
Computer: VPS452
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 6/4/2007 8:12:05 PM
Event time (UTC): 6/5/2007 12:12:05 AM
Event ID: ceb743a459cb4908a38d39d1f0391fab
Event sequence: 4447558
Event occurrence: 101
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/984/Root/Chat-1-128251571320000000
    Trust level: Full
    Application Virtual Path: /Chat
    Application Path: C:\Inetpub\vhosts\keithandthegirl.com\httpdocs\Chat\
    Machine name: VPS452
 
Process information:
    Process ID: 26264
    Process name: w3wp.exe
    Account name: VPS452\IWPD_1(katg)
 
Exception information:
    Exception type: NullReferenceException
    Exception message: Object reference not set to an instance of an object.
 
Request information:
    Request URL: http://www.keithandthegirl.com/Chat/ChatClient/settings.js.aspx
    Request path: /Chat/ChatClient/settings.js.aspx
    User host address: 68.173.149.15
    User: 
    Is authenticated: False
    Authentication Type: 
    Thread account name: VPS452\IWPD_1(katg)
 
Thread information:
    Thread ID: 1
    Thread account name: VPS452\IWPD_1(katg)
    Is impersonating: False
    Stack trace:    at CuteSoft.Chat.ChatDataManager.c(String A_0)
   at CuteSoft.Chat.ChatDataManager.GetUser(String uniquename)
   at CuteSoft.Chat.ChatApiImpl.DoGetUserSkinName(String uniquename)
   at CuteSoft.Chat.ChatApiImpl.GetUserSkinName(String uniquename)
   at CuteSoft.Chat.ChatWebUtility.get_SkinName()
   at ASP.chatclient_settings_js_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\Inetpub\vhosts\keithandthegirl.com\httpdocs\Chat\ChatClient\Settings.js.aspx:line 109
   at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
   at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
   at System.Web.UI.Page.Render(HtmlTextWriter writer)
   at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
   at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
   at System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
 
 
Custom event details: