A CL60 CREW; ENRTE FROM CYFB TO BUR; WERE INFORMED; BY ATC THEY WERE NOT ON THE PUBLISHED AIRWAY; TRACKING E OF THEIR CLRED RTE.

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WE LANDED IN CYFB AT XA07L FOR A TECH STOP ENRTE FROM EGGW TO BUR. WHILE FUELING; WE UPLINKED OUR FLT PLAN VIA DATALINK. OUR CLRNC WAS DELIVERED BY A CANADIAN COMRDO AT APPROX XA45Z WHILE HOLDING SHORT OF RWY 35. AT XA47Z; WE WERE RELEASED AND DEPARTED WITH AN IMMEDIATE TKOF IN FRONT OF A HAWKER ON A 4 MI FINAL TO OUR RWY. WE PROCEEDED TO OUR FIRST FIX YTE AND WERE INSTRUCTED TO RPT REACHING FL340 TO MONTREAL CTR. IT APPEARED THAT OUR DATALINK FLT PLAN IN THE FMS DID NOT CORRESPOND TO OUR CLRNC. CORRECTING THE PROB MANUALLY REVEALED DISCREPANCIES WITHIN OUR CURRENT FMS DATABASE. REALIZING A PROB WITH OUR CLRNC; WE NEEDED RTE VERIFICATION AFTER YTE. WHILE CLBING; OUR COM WITH CTR GRADUALLY DETERIORATED AND UPON OUR LEVELOFF; WE ADVISED THE CTLR THAT HIS RADIO WAS WEAK AND REQUESTED ANOTHER FREQ. BARELY AUDIBLE; HE PROVIDED US WITH A VHF FREQ OF 127.6. AFTER MULTIPLE ATTEMPTS TO REACH THE CTLR; WE RETURNED TO OUR PREVIOUS FREQ; BUT COULD NOT RE-ESTABLISH CONTACT. WE TRIED TO REACH ARCTIC RADIO ON ALL THE PUBLISHED HF FREQS; BUT RECEIVED NO RESPONSE. AIR-TO-AIR PROVIDED NO ASSISTANCE TO US AS WELL. ALL THE WHILE; WE MAINTAINED A LISTENING WATCH ON 121.5. WE WERE ALSO UNABLE TO LOCATE ANY PHONE NUMBERS TO DIAL ANY CANADIAN ATC FACILITIES THROUGH OUR SATCOM. AFTER ABOUT AN HR; WE FINALLY REACHED ARCTIC RADIO AND PROVIDED HIM WITH A FULL POS RPT. COM WAS DIFFICULT AT BEST; AND WHEN WE ASKED FOR A RTE VERIFICATION; WE RECEIVED NO AUDIBLE RESPONSE. AFTER SOME TIME; WE REACHED WINNIPEG ON A PUBLISHED VHF FREQ AND WERE INSTRUCTED TO 'IDENT.' THE CTLR ADVISED US THAT WE WERE NOT ON THE PUBLISHED AIRWAY AND WAS E OF OUR CLRED RTE. WE ASKED HIM IF WE SHOULD CORRECT OUR COURSE; BUT HE ADVISED US TO PROCEED DIRECT TO YYL. HE INFORMED US THAT HE WAS REQUIRED TO COMPLETE THE PAPERWORK REGARDING A GNE. AFTER REVIEW OF OUR COCKPIT PROCS; I FEEL THE ERROR COULD HAVE BEEN AVOIDED HAD EACH FIX HAD BEEN PROPERLY XCHKED BY EACH PLT INDIVIDUALLY. THIS PARTICULAR LEG OF OUR FLT SHOULD HAVE BEEN HANDLED MUCH LIKE OUR OVERWATER FLTS; WHERE BOTH CREW MEMBER XCHK EACH OTHER ON THE FMS. AFTER TALKING TO COLINS; THE AIRWAY WAS APPARENTLY DROPPED FROM THE DATABASE BECAUSE OF SOME INCONSISTENCY WITH THE COMMERCIAL CHART PROVIDER. UNFORTUNATELY; WE DID NOT NOTICE THE AIRWAY MISSING UNTIL IT WAS TOO LATE. SOME VALUABLE LESSONS WERE LEARNED AND I HAVE ADJUSTED MY PROCS ACCORDINGLY TO PREVENT THIS FROM HAPPENING IN THE FUTURE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR REVEALED THE AIRWAY IN QUESTION WAS J540. THE REASON GIVEN FOR ITS BEING DROPPED FROM THE DATABASE WAS DUPLICATION OF WAYPOINTS ALONG THE RTE. HIS COMPANY IS PRESENTLY INVESTIGATING THE MATTER. THE PRIMARY COMPLAINT EXPRESSED BY THE RPTR IS THE LACK OF INFO FORWARDED TO THE CREW'S FOREWARNING THEM OF SUCH OMISSIONS WHEN THEY OCCUR.