Poll keeps logging can't let anyone vote once a day

My host ugraded to this version of php and my poll is running fine except it locks everyone out after 1 vote.
I was trying to allow for voting evry 8 hours and it worked once. Now it's only once a poll. I made a new one and turned logging off and said not to check ips and set the locking time out to 0.
That still didn't work for me. No one can vote more than once a poll. Why? How do I change this?
Jan
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Toyota Granvia