Authorization object for MDG Search Material

Hi Experts,

Can anyone help me with the authorization object for SAP MDG Material to access Search material.

version SAP MDG 6.1 , EHP6, SP6

SAP Portal 7

Application is MDG_BS_MAT_SEARCH

For UI access we gave,

USMD_CREQ 

USMD_UI

M_MATE_NEU

M_MATE_MAN

We login from Portal and access 'Search Material' -> enter any mat # and click 'search'

"No results found"

This happens all the time, and we are not sure what authorization are necessary to complete search correctly.

If we give SAP_ALL, the search works correctly.

Thank You,

Shaila.