If you encounter difficulty viewing your music library in BlackBerry Link, you are not alone! In my search for the solution was in vain until I bumped into one solution which is not relevant to my issue.
When I load "Reliability Monitor", I noticed that "BlackBerryLink.Helper" kept crashing or stopped working. To access reliability monitor, just click Start menu, type "perfmon /rel" in the "Search programs and files" box.
However, you may not encounter this issue. So I hope what I did may also resolve your issue too.
Here you will learn how to remove and reinstall the Microsoft .NET Framework in order to correct the problem with your BlackBerry Link.
To uninstall the Microsoft .NET Framework:
You may proceed to perform updates via Windows Update thereafter.
You should be able to see your iTunes library in your BlackBerry Link and sync with your BB device!
Do let me know if this solution helps you or not. Alternatively, you can also use Google Music Player!