I was able to figure out the correct url.
The issue appears to be a problem with CURL connecting to secured sites. I can connect to http://www.webassist.com through your server, but it fails with a hard error like you see when I try to connect to https://www.webassist.com
Please ask your hosting company to debug the CURL installation and its ability to connect to sites secured with SSL and they should be able to fix it. Let me know if they are unable to for some reason.