Two things to try.
1. Create a caching policy for that website. Please change the keyword from prohire.com to webdocservices, restart the Wingate engine and test again.
2. Use the NAT connection method and intercept the web request (You may be experiencing a problem where MS will not allow the credentials to be sent through the proxy, hence we make a NAT connection, and then intercepts it with the proxy. As an alternative you can just use the WGIC; please advise if you are not sure.
a) So for NAT, you need to check it was installed:
b) Then setup the intercept
c) Then set the client machine to use NAT, which is basically done as follows.
If the WinGate servers internal IP address is:
192.168.0.1
255.255.255.0
Then the client would be
192.168.0.x
255.255.255.0
Gateway 192.168.0.1
DNS 192.168.0.1
Please let us know how you get on, and if you need further assistance we would be glad to help