Exel not loading every 2 days
 

i have a pretty decent sized speadsheet @work and 2 days
it just wont load up. gets stuck and exel freezes. i
have logoff and back in, then it works. cant get online,
and i have tried updates, computer has XP & Office Pro
with up to service pack 2 and searching alot of websites
and nothing. any suggestion?????

thanks

T