I was having something similar with rapidgator
What confused me was I seemed to be denied even getting their page to load using my Virginmedia connection, but using a
'3 mobile broadband', I had no problems at all
Then I hit on the idea of deleting Rapidgator cookies from my browser & it worked !
but I dunno what the situation is in the last couple of days (not had time to do much Downloading with RG) good luck