Help with dvd+rw

[duke82ish]

I burned a dvd+rw disc with an iso. I used the disc and it worked fine. I went to try and burn a different iso to it as it is a rw disc and when imgburn reads the disc it says disc not empy, which it shouldn't be, but the area to click and start burning is still greyed out. I'm a noob to this stuff, the videos I found on how to burn dvd's shows the same thing but they aren't greyed out for them and when they start the process it asks "the disc is not empty, all data will be lost, want to continue" however I can't get that far mine is greyed out and won't let me start the process. What am I doing wrong? Searched and can't find any topics. Anything would help Thanks!

Edited November 5, 2013 by duke82ish

[LIGHTNING UK!]

Copy + paste all of the disc info from the box on the right when you're in 'Write' mode please.

 

I'm guessing you've actually got a 'write once' disc in the drive and that's why you can't burn it again.