Plextor 8432a and firmware 1.09

when i enable dma on my drive with firmware 1.09 i get random lockups when burning a cd !
i’m currently using 1.07 with dma and now everything is ok !
i updated my motherboard bios today to verssion 1007f asus p3b-f i will now try again the 1.09 firmware for my plextor.
any sugestions ?

i also have that plextor with firmware 1.09 and here he works fine, but if 1.07 works with you i suggest to leave it on that firmware