DVD+RW Not recognized as a writable drive

There could be a few things going wrong here, firstly when you send a file using Windows poor inbuilt writing programme, i think you need to use a re writable disc, although i could be wrong, but thats worth a try.

Also go to My computer, right click on your dvd drive and go to properties, then along the top row of tabs, the end one should say 'Recording', click on the tab and make sue that 'Enable CD recording on this drive' is ticked, and just below make sure that the dvd you use is showing in the drop down window.

Finally if you still have trouble, my advice would be to use a dedicated programme for writing to cd and dvd for example Nero burning Rom or Nero 7 being the later version.

In this nero you use your drive as a 'floppy type' drive, where you right click on file and send to and it writes straight to the disk and also enables you to change the file or delete, unlike windows programme.