COM BREAKDOWN BTWN INBOUND PA32 FROM MCO APCH TO ISM CAUSES CLOSE-IN GAR FOR ANOTHER TRAINING FLT.

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ON NOV/XA/01; I FLEW MY PIPER SARATOGA ACFT; XXXX; ON AN IFR FLT PLAN; FROM MYRTLE BEACH; SC; TO KISSIMMEE; FL. WHILE APCHING THE KISSIMMEE ARPT; I WAS UNDER THE CTL OF ORL APCH CTL. ABOUT 7 MI FROM THE KISSIMMEE ARPT; ORL APCH CTL CLRED ME FOR A VISUAL APCH TO RWY 15. HOWEVER; NO AUTH WAS GIVEN TO ME AT THAT TIME TO CONTACT THE KISSIMMEE TWR. ABOUT 3.5 MI FROM THE END OF THE RWY; I CONTACTED ORL APCH CTL AND REQUESTED PERMISSION TO CHANGE TO THE TWR FREQ. ORL APCH CTL AUTH ME TO DO SO AT THAT TIME. THERE WAS MORE THAN 1 ACFT IN THE PATTERN VFR AND I WAS UNABLE TO CONTACT THE TWR UNTIL I WAS 2.5 MI FROM THE END OF RWY 15. NEEDLESS TO SAY; THE TWR CTLR WAS DISPLEASED WITH ME BECAUSE I HAD NOT CONTACTED HIM SOONER. THE TWR DIRECTED A TRAINING ACFT ON A SHORT FINAL TO GO AROUND AND CLRED ME TO LAND ON RWY 15; WHICH I DID. MY CONCERN IS THAT THIS SIT WOULD HAVE BEEN AVOIDED IF ORL APCH CTL HAD AUTH ME TO CONTACT THE TWR SOONER. ALSO; WHEN I RELATED THIS INCIDENT TO A CLOSE FRIEND WHO FLIES A PIPER AEROSTAR; HE TOLD ME THE SAME THING HAD HAPPENED TO HIM AT THE SAME ARPT 34 WKS EARLIER.