MapProgressBar hangs after few IdentityTasks and QueryTasks

Discussion created by tenax on Sep 5, 2013
Latest reply on Dec 16, 2013 by NManocha-esristaff
My application send a few IdentityTasks and few QueryTasks. Sometimes it works, sometimes it hangs. Fiddler show me, that requests was sent to the ArcGIS Server, but no response.
How come?
I use ArcGIS WPF Runtime v2.4.