I have recently bought BENQ DW1800 DVD±R. When I try to burn any data in DVD disc using nero, it burns but give some error msg"error:cant write disc at once". When I insert that dvd disc again in DVD writer, it(dvd writer) unable to read the data in the Disc. When I try to write more data in disc, a error msg appears "not able to write data in an open disc". I could not write any DVD successfully since I have bought it. I have wasted 4-5 discs because of this error. Is the problem with DVD writer or DVD disc or Nero?