Problem with burning DVD 2008-1 and 2008-2

Hi,

Is there any requirements which need to pay attention while brning the 2008-1 or 2008-2 professional image.

I tried on DVD+ and DVD- and DVD+RW, but always failed.

Just copy my old DVD works OK - but produces reading mistakes.

Thanks!

Tom

E91, December 2006, Navi Professional