Linking DM and RTC - How?

I'm unable to link DM with RTC. I've done the following.

Installed DM (https://amrrdmserver:29443/jts/) and RTC (https://amrrtcserver:9443/jts/) as separate JTS servers with unique ports.

In DM, made RTC a friend (outbound)
In RTC, made DM a consumer (inbound)

With the DM sample project tried to link to an RTC project (using Associations on Overview tab). On doing this I get the following error:

Failed to read matching artifact container catalog resource:

Unable to load URL: /jts/proxy?uri=https://amrrtcserver:9444/jazz/oslc/workitems/catalog&dojo.preventCache=1307474944648, Status: 500

What am I doing wrong?

thanks,
steve