I do not even try to download from that site anymore.
Try
www.avsim.com You will have to register but it is free and has a ton of downloads. I hardly ever have a problem downloading from there.
Flightsim is a great site but it is almost impossable to download from. Unless you pay for it.
I sometimes use that site to get ideas as what to look for at avsim. Sorry but it is true.
Avsim's huge library can be a little tricky trying to find something but with the wildcard use you can usually find what you are looking for. I like it when every now & then they will allow you to down load the entire list of there library. It makes things a lot easier to find
