Seems to be a bug, if you have tunneling enabled it leaks your ip and if you disable tunneling you can't continue to click to next page on some urls, seems to be a bug.
Proxiware - Failed to get proxy ip
-
Try changing protocol that you use.
Or find out IP address for ph.proxiware.com -
I think the only solution is to use another proxy provider. This completely overpriced crap does NOT work for me also. 3 proxy checkers are saying that the proxies are shit.

