During MIGO, FI document is posting in the cost center instead of IO

Hi,

Please advise.

1) We have a PO with A (asset) as a account assignment object.

2) In Po we further have internal order and profit center details.

3) While doing MIGO for the PO the cost center is showing up and the FI document is posted to cost center.

Requirement: FI document should be posted to internal order not to cost center.

I am not an FI guy , please help.