Hi,
One of two ways http://www.mediacollege.com/audio/connection/xlr-rca-1.html
As Oldears says check how the XLR is wired, but likely all is okay as pretty standard stuff.
Made mine with Neutrik XLR (silver contacts)> AN silver litz cable > Cardas RCA female connectors, worked fine with Reimyo CDP-777 & Magnum Dynalab 108T to Kondo preamp.
Tim
Tim