length of the query string for this request exceeds the configured maxQueryStringLength valu

every morning i open my website and go to log to find 6000 - 8000 log entries like this



Log type:  Unknown
  Severity:  11
  Message:  The length of the query string for this request exceeds the configured maxQueryStringLength value.
  Exception:  System.Web.HttpException (0x80004005): The length of the query string for this request exceeds the configured maxQueryStringLength value. at System.Web.HttpRequest.ValidateInputIfRequiredByConfig() at System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)
  IP address:  72.167.191.6
  Customer:  
  Page URL:  http://lebanese-market.com/conditionsinfo.aspx?ctl00$ctl00$ctrlheadermenu$ctrlsearchbox$btnsearch=se
  Referrer:  
  Created on:  4/7/2011 1:28:27 AM

Please take a look at the following page http://www.asp.net/LEARN/whitepapers/aspnet4#0.2__Toc253429244 ("Expanding the Range of Allowable URLs" section)