InfoPath Dev

Hi

I am triying to create a casscading dropdown feild in my web based form, I used this post: http://www.sharepoint-tips.com/2007/01/infopath-form-services-implementing.html was very useful, but I get this error when I test it in preview:

An unhandled exception has occured in the form's code

System.Security.SecurityException
Request failed.
   at Microsoft.Office.InfoPath.MsxmlNavigator.IsValidNode(MsxmlNode test)
   at Microsoft.Office.InfoPath.MsxmlNavigator.MoveToFirstChild()
   at MS.Internal.Xml.XPath.XPathChildIterator.MoveNext()
   at MS.Internal.Xml.XPath.ChildrenQuery.Advance()
   at MS.Internal.Xml.XPath.ChildrenQuery.Advance()
   at MS.Internal.Xml.XPath.XPathSelectionIterator.MoveNext()
   at System.Xml.XPath.XPathNavigator.SelectSingleNode(XPathExpression expression)
   at System.Xml.XPath.XPathNavigator.SelectSingleNode(String xpath, IXmlNamespaceResolver resolver)
   at Ishai_Form.FormCode.GetStateValue()
   at Ishai_Form.FormCode.SetCitiesOptions()
   at Ishai_Form.FormCode.State_Changed(Object sender, XmlEventArgs e)
   at Microsoft.Office.InfoPath.Internal.XmlEventHost.GenericProxy(Object genericDelegate, DataDOMEvent dataDOMEvent, InfoPathEvents type)
   at Microsoft.Office.InfoPath.Internal.XmlEventHost.ChangedProxy(DataDOMEvent dataDOMEvent)
   at Microsoft.Office.Interop.InfoPath.SemiTrust._DataDOMEventSink_SinkHelper.OnAfterChange(DataDOMEvent pDataDOMEvent)

And after I publish the form in the site I get no error but also it dose not work and the city field shows no data

I dont know what is the error mean... if any one can help me?

try setting your form to full trust also sign the form

open the template -> go to tools -: form options -> Security and trust

Set the security level to full trust

also sign the form template

Hi Qazi

Thanx for your quick rreply. It is working now.