C# Task<> Expert Needed

Hi, I have a WPF application, however the Task<> approach is blocking. I need someone to look at this via TeamViewer and to help diagnose and resolve the situation so that the Post and Update test methods works without blocking. I am only interested if you have had extensive Task<> / Async development experience for this and know this area very well. Please let me know your experience using TPL / TAP. Thanks,