Page 1 of DVD writing problem with Liteon 5005

I have had my machine for 6 months and for the most part have been impressed and satisfied with it.
But since the turn of the year (coincidence?) I have been plagued by a DVD writing problem with my Liteon 5005.
It is happy with VCDs but the TDK DVD+Rs I had been using fine up to now are not being accepted.
I have switched it off, unplugged it even... all to no avail.
I have no bought some new blanks to try it out....
Any help would be much appreciated.
Thanks in advance.

Roy

Hi Roy!
Sorry im a Newbie to this and the Liteon but was just gonna ask if you had your recorder linked though a digital box?? im having probs setting mine up if you can help that would be fab!
Good luck
Anthony