Not able to View Amount and LC Tab in PO History

Hi Experts,

I checked with the Previous Discussion on SCN regarding same issue but still i'm not able to get my issue resolved,

Here, user is not able to view Amount LC tab in PO History today in every PO he open and this happened to start from today before this he's able to see thise fields in PO History,

I checked the authorization objects and that are already assigned and even if tried all options in Choose Layout option to resolve the issue and even that din't work.

User is able to check this tab till yesterday

even when i open same PO with other User-id and with mine i'm able to see that FIELDS in hgistory tab..

Please Suggest

Arminder