♠KJT762 ♥AJT765 ♣A
Love all, RHO in first seat opens (sic) 1♠.
Well...?
Full deal below (scroll down a bit):
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Down 1, but I think declarer misplayed it - he pulled trumps when he had 10 cross-ruff tricks + the ♥K, which was good after I led the ace.
Thoughts?

Help

1♠ - 2♥ - p - p
3♦ - 4♥ - 5♦ - p
p - X - all pass