Closing a CRM 2013's webbrowser gives an error

Hi,

I am using Microsoft's Coded UI api to launch IE and navigate to CRM 2013's default page (which is out of box). But closing the browser throws  a prompt indicating Microsoft Dynamic CRM has encountered an error. Using the below code:      

 BrowserWindow ie = BrowserWindow.Launch("https://crm2013server/TestOrg"); //launch IE & go to CRM org

 ie.Close(); // close IE, and it throws the error

The error details:

Microsoft Dynamics CRM Error Report Contents

<CrmScriptErrorReport>
  <ReportVersion>1.0</ReportVersion>
  <ScriptErrorDetails>
   <Message>Object doesn't support property or method 'setProperty'</Message>
   <Line>238</Line>
   <URL>/main.aspx</URL>
   <PageURL>/main.aspx#457966145</PageURL>
   <Function>anonymous(){varreadyStateValue=0;//Copyoverthevalues..CopyOverValues();try{readyStateValue=wrapperNode.readyState;}catch(ex){}//Ifthehandlerisnotnull.Invokethehandlerand//storetheexceptionthrown.varexceptionNode=null;if(wrapperNode.onreadystatechange!=nul</Function>
   <CallStack>
    <Function>anonymous(){varreadyStateValue=0;//Copyoverthevalues..CopyOverValues();try{readyStateValue=wrapperNode.readyState;}catch(ex){}//Ifthehandlerisnotnull.Invokethehandlerand//storetheexceptionthrown.varexceptionNode=null;if(wrapperNode.onreadystatechange!=null){try{wrapperNode.onreadystatechange();}catch(ex){exceptionNode=ex;}}//IfthereadyStateisDONE.Updatetheattributeif(readyStateValue==4){inProgress=0;vartrackingElement=__vsttGetWfrTrackingElement();//updatethetrackinginformation..if(trackingElement){varcounterValue=trackingElement.getAttribute('xmlhttpcount');if(counterValue>0){trackingElement.setAttribute('xmlhttpcount',--counterValue);__vsttAjaxLog("XMLHttpRequestReadyState4Reached:Decrementedcounter");}}}//Re-throwtheexceptionfromthereadystatehandlerif(exceptionNode!=null){throwexceptionNode;}}</Function>
   </CallStack>
  </ScriptErrorDetails>
  <ClientInformation>
   <BrowserUserAgent>Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.3; WOW64; Trident/7.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729; InfoPath.3; 6511897)</BrowserUserAgent>
   <BrowserLanguage>en-US</BrowserLanguage>
   <SystemLanguage>en-US</SystemLanguage>
   <UserLanguage>en-US</UserLanguage>
   <ScreenResolution>1600x900</ScreenResolution>
   <ClientName>Web</ClientName>
   <ClientTime>2014-01-21T16:44:16</ClientTime>
  </ClientInformation>
  <ServerInformation>
    <OrgLanguage>1033</OrgLanguage>
    <OrgCulture>1033</OrgCulture>
    <UserLanguage>1033</UserLanguage>
    <UserCulture>1033</UserCulture>
    <OrgID>{53B91979-E87F-E311-921F-001DD8B81C5A}</OrgID>
    <UserID>{1EE6BB89-E87F-E311-921F-001DD8B81C5A}</UserID>
    <CRMVersion>6.0.1.61</CRMVersion>
  </ServerInformation>
</CrmScriptErrorReport>

George Cai