Haha,
Damn You guys, Dont push this guy off the cliff. Dude, thats a common problem . Dont you guys know that there isnt any firm standard for DVDs yet? it depends only on the DVD Writer brand. anyway, Ther r 2 types of DVDs in Srilanka.
1. Written DVDs - normally written in Srilanka. Recognizablr as the DVD label is a Sticker or a Printed paper. more Cheaper. from 100 buks <
2. Pressed DVDs - normally imported from Pakistn or Malasia. Recognzable by the Printed DVD label. More Cost , 250 buks <
normally when a DVD is written by a DVD Writer, thers a great chance that it will not detect on other Branded DVD roms. If the Reading Drive is a DVD Writer, then the Problem is more Critical . as in your case.
Therefore, the Pressed DVDs are the best for buying. Specially if you have a DVD Writer.
So shouldnt I need to tell you the solution. Check what type is your DVD.
Always bye a quality Pressed DVDs. Thats the Price for Having a DVD Writer. (Me too

)
or else Buy an extra DVD Rom. -they are less vonurable to the Written Brand Problem.
The DVD shop doesnt count. Even Unity has most of the Written DVDs. So Dont think your DVDV writer is in crash.
the more the cheaper DVD becoms, the more it will be less quality. The Univers is So balanced.
Reply me -
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-- Prefer Free Speech than Free Beer -Lokuhetty