Sharepoint - InfoPath Error - “Some rules were not applied”

Yesterday evening I had a very strange problem with InfoPath form. When I tried deploy it to Sharepoint production farm I received the error that “some rules were not applied”. The same form worked perfect when I tested in InfoPath client against the same Sharepoint deployment. It is very important to say, that I’m using a call to UserProfileService and GetUserProfileByName operation. The production farm consist of three WFE and we found the following exception in the log:

w3wp.exe (0x15D8)                       0x17A8 Forms Server                     Forms Services Data Objects       13zh                Exception            System.Net.WebException: The remote server returned an error: (401) Unauthorized.     at System.Net.HttpWebRequest.GetResponse()     at Microsoft.Office.InfoPath.Server.SolutionLifetime.WebServiceHelper.GetResponseHelper(WebRequest request, DataAdapterTimer dataAdapterTimer, DataAdapterCredentials credentials, Stopwatch timer, ExecWebRequestExceptionState state, String adapterName, Boolean isQuery)     at Microsoft.Office.InfoPath.Server.SolutionLifetime.WebServiceHelper.ExecWebRequestSync(XPathNavigator inputSubDOM, Boolean[] inputUseDataset, XPathNavigator resultsSubDOM, Boolean resultUseDataset, XPathNavigator errorsSubDOM, Uri serviceUrl, Uri soapAction, Int64 timeOutMillisec, Solution solution, Document document, String name, Boolean isQuery, DataAdapterTimer dataAdapterTimer, DataAd...

Server platform: Windows Server 2003 x64, SP2

The solution:

Check http://support.microsoft.com/kb/926642 (Method 2: Disable the authentication loopback check) and add DisableLoopbackCheck key on each WFE.

After reboot it works!