CAPT OF A CPR CL604 FAILED TO MAKE XING RESTR DUE TO RELYING ON THE FMC AUTOPLT TOO LONG BEFORE TAKING OVER MANUALLY.

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THIS RPT IS IN REF TO MISSED XING RESTR. WHILE THE CTLR SAID NOTHING TO US IN REF TO THIS INCIDENT; I FELT IT WAS WORTHWHILE TO RPT THE FACTORS INVOLVED. THE ACFT WAS A CL604 WHICH AS YOU KNOW IS HEAVILY AUTOMATED. I TYPED THE RESTR AND ALT INTO THE FMS AND ENGAGED THE VERT NAV PORTION OF THE AUTOPLT. I THEN TURNED MY ATTN TO REVIEWING THE PEACH SPRINGS ARR FOR LAS. WHETHER I DID NOT TYPE THE INFO IN CORRECTLY OR THERE WAS SOME SORT OF EQUIP PROB I'M NOT SURE. REGARDLESS; THE ACFT DID NOT START DOWN ON TIME AND I DIDN'T NOTICE IT. WE STARTED DOWN MANUALLY (NO AUTOPLT -- I DISENGAGED IT) BUT STILL MISSED THE RESTR. I PLACED TOO MUCH FAITH IN THE AUTOMATION AND DIDN'T MONITOR IT. I THINK FATIGUE WAS ALSO A FACTOR. I FLY AN OLDER CL601 WITH THE 'STEAM' GAUGES AND NO FMS. WE SOMETIMES JOKE THAT IT IS EASIER TO FLY BECAUSE 'WHAT YOU SEE IS WHAT YOU GET.' I'M SURE THAT THE ASRS GETS QUITE A FEW RPTS OF THIS TYPE. I FEEL THAT THE ONLY WAY TO PREVENT A RECURRENCE OF A PROB OF THIS TYPE IS TO TRY OUR BEST TO OVERCOME THE HUMAN TENDENCY TO TRUST SOMETHING THAT HAS SERVED US WELL MANY TIMES IN THE PAST -- BUT MAY NOT IN THE PRESENT OR THE FUTURE.