Benq 1650 will not run Speed on DL media

I started to put this under the other post on Speed 4.5, but not sure it should go there. I received my 1650 last night and burned 3 Verbatim DL disk last night. Tonight I installed Speed 4.50. When doing a quality scan on DL disk, it will get to 49% and stop. Shortly after, it will crash the program. I tried DL’s burned on this drive and my other drive, a Sony. Both the same. I tried the quality scan on my Sony and it works fine. The only DVD’s it has problems with are the DL’s. 4.7 gig DVD’s work just fine on it.

Does anyone have any ideas?