hi, im trying to burn my first dual layer dvd. i have a sony dw-d26A burner. its rated for 4x dvd+r DL i bought the verbatim dvd+r dl, up to 6x recording it says. the program i am using is NTI DVD maker, the one that came with the burner. it definitely recognizes that the dvd is a DL, but it won't burn, it keeps showing the file size limit to add is 5 gigs, it doesn't look like i can just stick in a DL disc and do the same things. is there anything else i have to do? can NTI dvd maker even burn dual layer? help much appreciated. thanks!