Problem with Japanese Log on Language

Hi Gurus,

I am working on Japanese Log on Language. We are using ECC 6.0 Unicode system.

The Problem is, When I log on to Japanese and went to any of the transaction and press F4 for possible values. The Tabs are displaying as "??????" instead of descriptions.

Ex : Goto MM03 -> in the material no field Press 'F4'. The tabs which are opened to select the material all are displaying as ????? instead of their descriptions.

Thanks

Srihari.