Since you can access other web sites your Internet connection is Ok. There is no need to handle with winsock.

I've just tried to access to the windowsmoviemake­rs.­net and got a message that my PC (with firefox browser) can't access the site. I tried once more with my mobile phone and opened this site without any problem. It really looks strange.

Maybe it is just a temporary problem of the "windowsmoviemakers.net" server?