[mew-int 3048] how to save gmail password in this condition ?

my setup is like this:
Mew -> local stunnel server -> proxy server -> google imap ssl.

the proxy server can only proxy my imap stream to gmail, instead of every other sites.

my mew configure is:

(setq mew-config-alist 
;;Gmail
      '(
	("default"
	 ("mailbox-type" . "imap")
	 ("name"	. "myname")
	 ("user"	. "myaccount <at> gmail.com")
	 ("mail-domain" . "gmail.com")
	 ("proto" . "%")
	 ("imap-server"	. "127.0.0.1")
	 ("imap-port" . "11111")
	 ("imap-user"	. "myaccount <at> gmail.com")
	 ;; ...
	 )
	))
(setq mew-passwd-alist '(("myaccount <at> gmail.com <at> 127.0.0.1:imap" "mypasswd" 0)))

when I start mew, it ask me to input password for "myaccount <at> gmail.com <at> 127.0.0.1",
though I have setted it.
how can I make the password in configure file works ?

also,