Which version of poser are you using? Because with the more recent versions, you don't have to turn off the IK to apply a pose. Of course, I'm assuming you're loading a pose not building one of your own.

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Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
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I use Poser 13 and win 10