can the pro 900 and 900 XSC work together

I;ve been using a range of series 2 xbees for some remote monitoring projects, and have recently bought a pair of pro 900’s to run a slightly long range project. I’ve borrowed a 900 XSC for some tests to see if they can work with the 900’s I currently have But have not had any success.

I;ve set the VID’s and related parameters to match, have set the baud rates… am I missing something or trying the impossible? thanks in advance for any tips.