Hi, I'm from Argentina,

I'm getting the following Warning in Application Event Viewer. The IP trying to access the server is from Google crawling my site. I'm getting a Warning every 20 minutes.

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 6/23/2009 4:48:12 PM
Event time (UTC): 6/23/2009 7:48:12 PM
Event ID: 14c03f477bda4f32add05c8cf18597a4
Event sequence: 391
Event occurrence: 53
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/1/Root-1-128902365836656920
    Trust level: Full
    Application Virtual Path: /
    Application Path:
    Machine name:
 
Process information:
    Process ID: 3476
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: NullReferenceException
    Exception message: Object reference not set to an instance of an object.
 
Request information:
    Request URL: http://localhost/arg/search/viewIt/item.aspx?UdZyK2MX6k+9bcxv4FgImLRtmhF0OmEM+Z07GBKGlaaDvdABaQDb/GMEuSpoVJD+
    Request path: /arg/search/viewIt/item.aspx
    User host address: 66.249.66.226
    User:  
    Is authenticated: False
    Authentication Type:  
    Thread account name: NT AUTHORITY\NETWORK SERVICE
 
Thread information:
    Thread ID: 7
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at localhost.arg.search.viewIt.item.Page_Load(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at cmrural.classes.CBasePage.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
 

Any ideas ?? Thanks !!