More frustrations with Riteks G04's-Please help

I just received my 2nd batch of Ritek/ RiData 4x DVD-R. Got these from Supermediastore dot com. I was told that these were the G04's. The ? is that it took an hour to burn a movie again. When I started the process, using RecordNow Max the 5 second count down to begin burning indicated that it was at 4X. 45 mins later when I returned the process was still going. It just finished at an hour. I've upgraded to the latest firmware for my Sony DW-U12A. I watched the meter on RecordNow Max as the 5 second countdown started. After the process was 5% in, at 14 mins remaining, it then switched and it read that there was 58 mins remaining. In other words, it seems like the burn speed went from 4X to 1X. I don't understand what the problem is. I have had success burning at 2X with TDK's. This forum endorses Riteks, so please inform me on what I'm doing wrong? I have my DMA enabled and I upgraded my RecordNow Max 4.5 to the PX 408 engine-just to answer any potential ?'s on your part.