Doesn't this library have native code (.so or .dll files)?
You might need to reference these as well.

Thanks PhiLho, I added the native code to the build path but its still throwing the same error. Its really weird.

In the Project > Java Build Path.

Score ! Thanks PhiLho and Monkstone, that solved it ! So after i added the native code to build path, I was still receiving errors. I then had to zip all the native code files (extensions .so and .dll) in a zip format so they can be read and that resolved everything.