Internal orders commitment lines KOB2 are not getting updated

Created Purchase Order with two lines and account assignment group F

One line gave the material and another line gave the description only.

Assigned internal order number for both (in IO commitment has been checked)

When I save the PO in KOB2 commitment lines I could able to see the expense line details only not the details of the line entered with Material.

Can any one please help

Thanks,

Sudha