Lg gsa-h55n Won't write any think!

My product is about a year old i use it on and off the problem is it won’t write (dvd’s or cd’s) I had gone threw the first steps reinstall nero, reboot the pc etc but it i choose the files that need burning though the burning icon won’t show up it also can still read disk’s (cd-dvd) here’s a few screenshots if any more info is needed just ask

Last time i did use it was roughly a week ago it worked fine then.

I’ve heard that dvd-rewriters can only burn for so long?

http://mothsoccer.angelfire.com/Picture_one.bmp (this picture shows what it is capable of doing)

http://mothsoccer.angelfire.com/Picture_two.bmp (Nero screen shot)