Star Polyp that wont open

I bought this large star polyp attached to live rock. When I got it would open slightly, then I moved it a few times and it will not open at all. Its 4 days old. Has not opened even at night. I know they are hardy, some say it may take a week. But I am worried because it has not shown any good signs of opening. All the other corals are doing great.
 
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