Make sure first of all that you are using the correct claw, I know that may seem silly, but there are at least 6 different claws I've found in the game.
Secondly, go into your inventory, examine the claw that is required to open said door and flip around to the palm of the claw. Put the sequence in from top to bottom and try opening the door, if you are looking at the wrong claw for the sequence (ex.- your using the ruby claws sequence instead of the ebony claws(for the ebony door)) then that is most likely why you are getting shot by poison darts for inputting the wrong sequence.
IF that is not the case, you may need to reset the game, meaning fully exit the game, restart it and load up your save file again, and proceed to enter the correct sequence again. It should work. If that still doesn't work then you are not supposed to be in that dungeon because it's related to a story quest that you haven't gotten to yet.
edit- It is also possible in very rare cases that the game has broken down on a fundamental scale and the only way to fix this problem is through creating a new game, it sucks, but I have come across several instances where this happened to me. Mainly walking out of a house and being unable to move... and having a dragon choose that exact moment to attack. Short story, I died... alot. If your character is not too high in level, probably anything before level 15 I would recommend just starting a new game. Or just don't worry about that dungeon.