DVD-R 8x Burning?

I have an LG 8x super multi DVD Burner (HL-DT-ST DVDRAM GSA-4082B A204).I use Nero Vision Express ot burn downloaded movie off limewire and this is what happens: I import the movie, let it transcode and then just as it's about to burn i get this message "there is not enough space to burn this complilation, Please insert another disc that has enough space". I know for a fact that the 8x DVD's i put in are blank and before i burn the capcity of the project says something like 4.24 of 4.38gb used. I have been able to burn movies this way before but i have to knock the quality way down to like 2.3GB(Superlong play) or lower wich dosn't make any sence to me when the movie is less than 2hours long. So i should be able to fit more on a DVD Right for Standard mode riigh? I have upgraded the Firmware to HL-DT-ST DVDRAM GSA-4082B E204 and then HL-DT-ST DVDRAM GSA-4082B A209, and it didn't help. Could it have anything to do with the disc i'm using? I really have no idea why it dosn't work.