So I am trying to get Cabal running for the first time and its a horrid nightmare

At first i downloaded the EU client because the US one didnt come up. SO that was 2 hours wasted.

Then I tried DL'd the US one, but the website was crashing my download so I spent about 3-4 hours trying to get it to work because it would say network error. SO I found an old copy online. Downloaded it. and NOW.

I get an error every time when I go to play that says

data/ability.enc is not found or corrupt

I just wanna play Cabal and I cant get it working....

Can anyone help me?