[Evolution] No new mail detection

[Jeff Martin <jeffm tampabay rr com>]

Something about my setup is not allowing evolution to detect new mail. 
Once I run evolution for the first time (and import my existing IMAP 
mail), evolution will never ever pick up any new mail again. Restarting 
evolution (nor linux) doesn't help.

Mandrake linux 10.0
evolution: 1.5.7-2mdk
imap-2002d-8mdk

using IMAP from my own local machine (mozilla-mail and other IMAP 
clients work fine). I do store my IMAP folders in my home directory so 
that they are included in backups, such as
[jeff server jeff]$ ls -als /var/spool/mail/jeff
0 lrwxrwxrwx  1 root mail 21 Jul 27  2003 /var/spool/mail/jeff -> 
/home/jeff/mail/Inbox

Any ideas?

Jeff