LIke the previous fella said, your Imation media is pretty much junk. About the only retail media worth a darn is Sony or Verbatim. Anything else is a crap shoot as they all farm their media production out to sub-contractors. The best media I know of is Taiyo-Yuden. You will have to look on-line to find it though.
Also, when burning, be sure to not exceed the rated speed of the media, even if the drive wants to burn it faster. A good ballpark to stay in is 1/2 the rated speed of your drive (8x on a 16x drive) making sure to not exceed the rated speed of your blank media.
That should get you going.