PLT OF UNKNOWN ACFT TYPE LANDS ON TXWY AT PBI.

Narrative

ON ILS APCH TO RWY 9L AT PBI I DECIDED I COULD NOT RELY UPON HSI AS THE INST APPEARED TO BE MALFUNCTIONING. IT WAS A CLR MORNING WITH LIGHT WINDS; SO I REQUESTED A VISUAL APCH TO RWY 9R. I HAD THE CURRENT ATIS; BUT FAILED TO NOTE THE ATIS WARNING TO BE AWARE OF THE CONFUSING TXWY BTWN RWYS 9L AND 9R. THE ATIS CLRLY WARNED OF CONFUSING THE TXWY WITH RWY 9R. I LANDED ON THE TXWY BTWN RWYS 9R AND 9L. THE TXWY BTWN RWYS 9R AND 9L IS OF SIMILAR WIDTH AND LENGTH AS RWY 9R. IT IS PROPERLY MARKED AS A TXWY. THERE WERE NO OTHER ACFT USING THE TXWY OR ANY ADJACENT TXWY. THERE WERE NO OTHER ACFT ON EITHER RWY 9R OR 9L. CONSEQUENTLY; THE PAVEMENT MARKINGS WERE THE ONLY METHOD AVAILABLE TO DISTINGUISH THE TXWY FROM THE RWY. AFTER LNDG ON THE TXWY THE CTL TWR ORDERED ME TO 'GO AROUND.' THE ORDER WAS TOO LATE AS I HAD ALREADY LANDED AND SLOWED THE ACFT FOR THE TURN ONTO THE TXWY. I HAVE FREQUENTLY LANDED AT PBI AND NEVER EXPERIENCED THE CONFUSION IN THE PAST. FACTORS CONTRIBUTING TO MY ERROR INCLUDE: CHANGE FROM ILS RWY 9L TO VISUAL APCH TO RWY 9R WITH A MALFUNCTIONING HSI. FLYING DIRECTLY INTO EARLY MORNING SUN ON A CLR MORNING. MY FAILURE TO HEED ATIS WARNING AT PBI. MY FAILURE TO PROPERLY DISTINGUISH THE PAVEMENT MARKINGS OF THE TXWY FROM RWY 9R. THE FAILURE OF THE CTL TWR TO OBSERVE MY LNDG AND WARN PRIOR TO TOUCHDOWN. I WILL REMEDY MY ERROR BY REFRESHING MY KNOWLEDGE OF PAVEMENT MARKINGS; EXERCISING MORE CARE ON LNDG; AND TAKING MORE TIME TO NOTE ALL ATIS INFO.