Money 99 and Regional Settings problem

I recently had to do a full system restore after which I noticed the date in
MSMoney 99 was set US style, mm/dd/yyyy. As I live in England it is important
I should record my accounts in UK style, dd/mm/yyyy. I changed the setting in
Regional Settings but every time I came out of that the date reset to US
style. I then discovered that after resetting the date to UK style, if I went
to the first tab in Regional Settings, that is 'Regional Settings' and
highlighted 'English (United Kingdom)' followed by 'Apply' then the setting
remained changed - but only for that session. After shutting down my pc I
found that next time I booted up the setting had changed back to the US
style!! I tried reloading MSMoney but it has made no difference. Can anyone
shed light on how to resolve this please?