Project API does not work after implementation of Project Management module

I had following APIs successfully:

1.       Create Draft Budget       > pa_budget_pub.create_draft_budget

2.       Create Budget Lines      > pa_budget_pub.add_budget_line

3.       Baseline budget              > pa_budget_pub.baseline_budget

But after the implementing Project Management Module they are giving error. When create draft budget is called, I am getting following error: ‘This budget type has been upgraded to a plan type. You can create new versions only for the corresponding plan type.’

I see ‘p_fin_plan_type_id’ parameters in all 3 APIs, but also see ‘CREATE_DRAFT_FINPLAN’ procedure.

Would appreciate if someone can share their experience with the API after PM module.