Burning software won't read DVDs


In Runtime
Ok so I am trying to burn a Divx movie but the problem is that both Divx and Windows Media Player says "Insert blank disk". My drive is reading the disk however. If I use Memorex then it will show and I can burn movies but I have these no name brand DVDs that work fine when burning games, applications but I can't burn movies using Divx or anything else. I am out of Memorexes and want to use these bunch of DVDs and never ever buy no-name brand DVDs again. Any help would be appreciated, thanks. By the way I have LG GSA-H22L burner.