hello,
i enable the permission to guest so they can view and post to polls.
but even though i made this changes, guests coud still not able to vote.
Guests are specifically excluded from voting on polls. There is no option in Guest Permissions to Vote in polls like there is for any other member group. There is no way to override this.
Add some text like, "Join this forum to be able to vote here" in the Poll Topic text.