Error: ISAPI 'C:\windows\Microsoft.net\Framework64\v2.0.50727\aspnet_isapi.dll' reported itself as unhealthly for the following reason: 'Deadlock detected'.

Hi,
   We currently have IIS 7.0 installed on Windows Server 2008 machine and have a WCF.Net Service (http://machinename:8181/ABCService/Xyz.svc) configured on it. A website sents requests to this WCF.NET service and expects a response from it.
Sometimes, when we send requests to this URL, we notice that the URL is unresponsive and we find the below error in the event viewer.
ISAPI 'C:\windows\Microsoft.net\Framework64\v2.0.50727\aspnet_isapi.dll' reported itself as unhealthly for the following reason: 'Deadlock detected'.
I have referred the URL http://blogs.msdn.com/b/perfdude/archive/2008/09/21/web-server-deadlocks-aspnet-isapi-dll.aspx  and http://support.microsoft.com/kb/821268 , which suggest to tune th ...