Debian Etch Gnome

Evolution mail.
When I try to empty the trash folder I get :
"Error while expunging folder."
Error storing '~/.evolution/mail/local ( mbox)':
Summery and mismatch, even after a sync

When I quit evolution mail I always empty
the trash folder. No message yesterday, but
today there still are some 7000 messages in
the trash folder!?

I tried to use the Gnome search tool to find
"/.evolution/mail" and some other search
options in order to find this folder and
delete it manually but I never found much
with this tool.
What can I do now?