Hi guys, I'm currently using Revit 2014, but have a serious problem (have contact Autodesk support team but they send me here instead):

1. The Rendering library error sometimes shows and sometimes not shows when start Revit
2. I have select the check box for the Autodesk Material Library when installing, the material library also shows it's successfully installed in my computer
3. Problems:
* a. the 'Material' button does NOT react when clicking it*


b. 'Material Assets' and 'Rendering' options are grey-ed out.

Anyone have same problem? Or any professions can help me p,ease? Thanks in advance