CPR BEECH JET INADVERTENTLY SET THE WRONG TWR FREQ PRIOR TO LNDG; RESULTING IN LOST COM WITH THE LCL TWR CTLR. INSTRUCTIONS TO EXIT THE RWY ON THE HIGH SPD TURNOFF FELL ON DEAF EARS.

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AFTER BEING CLRED TO LAND ON RWY 19R; WE CONTINUED A NORMAL APCH AND LNDG ON RWY 19R. DURING THE LNDG ROLL; WE NEVER HEARD ANY INSTRUCTION FROM ATC ON WHERE TO EXIT THE RWY. WE KNEW WE HAD LNDG TFC BEHIND US; SO THE PF EXITED THE RWY ON THE CLOSEST TXWY WHICH WAS A REVERSE HIGH SPD. AFTER CLRING THE RWY; WE REALIZED WE WERE ON THE WRONG FREQ. WE THEN SWITCHED BACK TO TWR AND RPTED CLR OF RWY 19R. THE CTLR WAS UPSET WITH US STATING THAT WE WERE INSTRUCTED TO EXIT THE RWY ON THE HIGH SPD TXWY; AND GAVE US THE PHONE NUMBER TO TWR ASKED US TO CALL THEM ON A LANDLINE. THE CAPT AND I BRIEFED THE SIT AND CONCLUDED THAT PLT ERROR ON THE PNF'S PART WAS THE REASON WE MISSED THE RADIO CALL. AFTER BEING CLRED TO LAND FROM TWR; THE PNF TRIED TO PUT THE GND FREQ IN THE PRESELECT SLOT ON COM #1 AND ACCIDENTALLY XFERRED THE ACTIVE FREQ BACK TO APCH. WE CALLED THE TWR AND EXPLAINED THE SIT TO HIM IN DETAIL. HE SEEMED UNDERSTANDING; AND HIGHLY STRESSED THE IMPORTANCE OF RWY INCURSION AWARENESS. WE ARE UNSURE IF ANY FURTHER ACTION WILL BE TAKEN.