hi guyz...got some problem here. i recently purchased LITE-ON DVDRW SHW-160P6S and it has started giving some trouble. it can write cd's coolly, tho was giving trouble wid d cheaper writex ones...no problem yet wid d moser baer ones. it is giving trouble wid d dvd ritin from day 1...i am using d intex dvd-r media and d recurrent scenario is dat i can burn d first dvd ok...but d second dvd just doesnt get burnt. i also dont hav no power supply rite now cos its getting repaired. d dvd which doesnt get burnt along wid d previous writex cds which weren't gettin burnt...all give a peculiar sound wen in d drive....like d laser going tak..tak..tak shud i try more expensive and reliable media.... shud i get my power supply back... shud i get my lens cleaned... ??? plz help me...i hav some urgent riting to do!!