Outlook 2003 - prompt for profile not working

Hi,

Im running Outlook 2003 which has been working fine for the past 2 years
while set up like this. I have 3 profiles set up for 3 different mail
accounts. Outlook usually prompts me to choose a profile when i start up
outlook, for some reason this is no longer giving me the option and just
opening one of the three profiles. I have tried a few things now to fix it -
even if i set it to "always open this profile" its not that profile that
opens. Anyone know why this could suddenly stop asking me which profile to
use?

I've tried re-installing office and also doing a detect and repair - this
hasn't fixed the issue.

Thanks in advance

Lindsey