Linking RTC with RQM

Following steps in http://jazz.net/library/techtip/304/
We think we've gotten past the cross-server comms config - configured on RTC, confirmed on RQM. But we're getting this generic 500 error when trying to add the link to our RTC project area:
Problem Fetching Remote Data:
Unable to load URL: /jazz/proxy?uri=https%3A%2F%2F<_RQM_ip_address_>%3A13443%2Fjazz%2Frootservices, Status: 500
The servers are located on opposite sides of the planet, not sure how timezones might affect the oauth clock sync or if we're already past that point.
I am able to hit the rootservices URL from a browser and after confirming the ssl cert I get the XML doc.
We think we've gotten past the cross-server comms config - configured on RTC, confirmed on RQM. But we're getting this generic 500 error when trying to add the link to our RTC project area:
Problem Fetching Remote Data:
Unable to load URL: /jazz/proxy?uri=https%3A%2F%2F<_RQM_ip_address_>%3A13443%2Fjazz%2Frootservices, Status: 500
The servers are located on opposite sides of the planet, not sure how timezones might affect the oauth clock sync or if we're already past that point.
I am able to hit the rootservices URL from a browser and after confirming the ssl cert I get the XML doc.