error code 17

I need help. I am trying to register h & r block and it tells me that I have no internet connection which of I do. And it also gives me error code 17. Can anyone help me with this? I also tried to download the reimage software and it told me that I have no connection and i do. I tried disabling the firewall and it did the same thing. My virus protection is from Comcast.....so is there something else that I have to do? window mentioned something about an unknown socket? I have used this computer for several years and operate with XP 32bit and never had a problem with this tax program before. I fell into the error end trap and deleted that. I downloaded cclean and did that just fine. Starting to bang my head against the wall here.
:cry