Wrong MRP Element in MD04

Hi,

I am facing an issue in the MRP element in MD04.I have some POs which has PO confirmation maintained in it.These POs needs to show MRP element as 'POConf' in MD04 but it is showing as 'POItem'.I have checked the configuration for"Check Texts for the MRP element" and 'POConf' is maintained in it.

Please suggest how will I get MRP element as'POConf' for POs having PO confirmation.

-Amol