dd/mm/yyyy date format appearing as yyyymmdd in 4.1 SP5 webI reports

Hi Experts,

We have currently migrated from Business Objects 4.0 to 4.1 SP5 . What we are observing is a lot of reports are showing incorrect formula outputs because the formulas were designed based on UK date format dd/mm/yyyy however in 4.1 they are appearing in 4.1 SP5 in yyyymmdd format .

I tried changing the date format in  \dataaccess\connectionserver\oledb\extensions\legacy\oledb.prm and also played around BI launchpad preference from browser locale to English(UK) but nothing worked .

I observed GetPrferredViewingLocale() is returning EN_US .

Kindly suggest what to do here .

Regards,

Sourav Roy