I was going to ask if you took all the protective plastic off the clasp, but thought that would be like asking if a non-working appliance is plugged in. LOL
Actually, when the plastic was clear, I missed some on one of my clasps in the past, which caused my clasp not to close well. But now I believe they use blue plastic on all new watches, so it's easy to spot.
Anyway, glad you solved it!
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