[squid-users] object updating delay ??

[Paolo]

Squid 2.2 stable5
my problem is : uploading a new html document on my provider's web server,
Squid does'nt display the updated document but the cached one. Forcing the
browser's update does not give results. After a time of  ~15min. Squid
update the object. I don't know if there's a bug of Squid or an option to
set.
Please help! :-) thank a lot!