RPTR BELIEVES HE USED THE WRONG FACILITY FOR GETTING AN IFR FLT PLAN AFTER MAKING A VFR TKOF.

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I HAD FLOWN MY EMPLOYEE FROM SCRANTON; PA; TO PENNO LANDING (PIER 36) HELIPORT; PA; AND WAITED AT THAT LOCATION FOR A RETURN FLT. DURING MY WAIT; I CHKED HRLY WX WITH WILLIAMSPORT FSS AND FILED AN IFR FLT PLAN FOR DEP TO RETURN TO SCRANTON. PHILADELPHIA WAS VFR AS WELL AS SCRANTON ALTHOUGH ALLENTOWN WAS CALLING 3200 OVCST. I LISTED MY DEP POINT ON MY FLT PLAN AS ABE WITH ROUTING AS ABE-V149-RITTY-AVP. AFTER DEPARTING PHILADELPHIA (PENNO LNDG) VFR AND APPROX 20 NM S OF KABE I CONTACTED ALLENTOWN CLRNC DELIVERY ON 118.9 TO PLACE MY CLRNC ON REQUEST. MY CLRNC WAS GIVEN AS FILED AND I WAS INSTRUCTED TO CONTACT ALLENTOWN APCH CTL ON APPROPRIATE FREQ. I WAS VFR AT 2500 WHEN I CONTACTED APCH CTL (ALLENTOWN) ALTHOUGH I HAD CHANGED TO MY ASSIGNED IFR TRANSPONDER CODE WHEN RECEIVING CLRNC. APPARENTLY; BY RECEIVING MY CLRNC FROM THE REMOTE (118.9) ALLENTOWN CLRNC DELIVERY; AND SQUAWKING ASSIGNED CODE; I CAUSED SOME CONCERN WITH BOTH PHILADELPHIA APCH AND ALLENTOWN APCH. IN CONTACTING ALLENTOWN APCH AT 2500 AND VFR; I WAS SUBSEQUENTLY ASSIGNED 5000 FT AND PROCEEDED AS FILED. WHEN USING THIS METHOD IN THE FUTURE TO ACTUATE OR RECEIVE CLRNC FOR AN IFR FLT PLAN; I WILL CERTAINLY CONTACT THE APPROPRIATE APCH CTL FREQ FOR CLRNC AS OPPOSED TO THE REMOTE CLRNC DELIVERY FREQ.