Download problems?

I have an lg km900 arena mobilephone and upto a couple weeks ago, i had no problems at all with the phone and downloading apps was with no problems. Today when i try to download any app, i have a grey colour screen appear with the contents of, box with url below this the word status and below this, net.air. Theres also an option list with the first being start (start download) and 4 other options i dont understand. When pressing start, i get no network or connection failed,null. What has gone wrñg w4th my phone