Hello friends..I've got a weird problem.I bought Sony DVDRW (SONY CD/DVDRW Dual layer Q120A) 16X nearly 8 months ago.Earlier everything was fine.I was able to burn normal CD/CDRW s as well as DVD/DVDRW s .Now something wrong happened a month ago.I m no longer able to do a read what i've written after this problem happened ,unless i check it immediately after burning without ejecting the media.Once the media is ejected it never reads the DVD ,the light of the burnetr just remains ON,the system almost hangs when i try to open the cd drive by clicking on it.Now whatever i have written on my burner,is completely fine when i checked it on my friends computer with the burner of same quality.Even the Nero Burner says "burn process completed successfully" but i cud not read.Now all the medias i 've burned before this problems is easily readable in the same burner.There s no problem at all with the rewritable DVDs and CDs(both once writable and RWs as well).Another crappy problems is that i'm not able to do a multisession in DVDR s but its fine with the DVDRWs and CDs (both R/RWs)..Is there any problem with the firmware.Under what conditions do we need to upgrade the firmware and from where are we supposed to get the software n what is the procedure.Can ny one plz help me how to sort this problem out.Its really irritating ,as m able to burn DVDs(obviously without multisession) but not able to read those discs.Plz help me.Thanx in advance.