Was your car originally manual top? You can tell by either the PHS or by reading the stamping on the inside of the top frame.
Vikki, Correct diagnosis - I saw an earlier post you made on the same subject circa 3/09. Interestingly, my PHS says power top, but the frame has FM stamped on the arm - accordingly we reinforced the frame to prevent the bucklng that occurs during conversion of manual to power, but our current predicament suggests I am missing something...Regards - John