Material Group in PO

Hi All,

I am using ECC6.0 IDEAS. When i am creating Service PO automatically Material Group "007" is coming in PO. I want to know what is the configuration behind that.

My issue is that in DEV client i have created different Material group for Service. I don't know where to assign. when i am creating PO without material group then the Service & Limits Tab is totally blank in the Item Details Screen.

Guide me in above issue.

Thanks & Regards

Sangram