Ximian evolution unable to lock /var/spool/mail/xxxx

[franck routier <f.routier@wanadoo.fr>]

Hello,

I try to use evolution mail reader (and more) on a sid box.

Each time I try to check my mail,I go this message :

Error while performing operation :
unable to create lock file for /var/spool/mail/xxxx : access denied

(error message might not be accurated, I translate it from french)

My mail setting says :
standard unix mailbox file
path : /var/spoolmail/xxxx

(xxxx is my user name of course)

Thanks

Franck