I too had trouble with Go Daddy but it was a silly mistake
As another poster asked - is this PHP and SQL? If so, should not be a problem. A few weeks back I was also almost ripping my hair out and blaming Go Daddy but it turned out I had settings wrong in DW. I was getting username/password errors and I checked them over and over. Check your testing server settings. I don't get it. I wasn't even using the testing server but once I set that up the same as the remote, everything was fine.