Internal order vanishing while booking expense with grant

Hi Experts,

We are in the process of implementing Grantee management in integration with Funds Management.

We are in ECC 6 EHP 6.

My setting are as below:

I have maintained Fund Center, Grant and Sponsored program in internal order.

I am deriving fund center  through FMDERIVE.

I am deriving Grant and Sponsored program from GMDERIVE.

Issue:

While I am booking an expense using this internal order, the internal order vanishes after deriving fund center and commitment item through FMDERIVE.

Since the internal order is vanishing, its not going to GMDERIVE to derive Grant.

Kindly help me on this.

Why the internal order is vanishing!!!!

Regards

Omprakash