VM 7.19 locks up repeatedly with GNU Emacs 21.3

[Madhusudan Singh]

I have the following in my .emacs :

(setq vm-toolbar-pixmap-directory "/usr/local/emacs/share/emacs/site-
lisp/vm")
(setq vm-image-directory "/usr/local/emacs/share/emacs/site-lisp/vm")
(autoload 'vm "vm" "Start VM on your primary inbox." t)
(autoload 'vm-other-frame "vm" "Like `vm' but starts in another frame
." t)
(autoload 'vm-visit-folder "vm" "Start VM on an arbitrary folder." t)
(autoload 'vm-visit-virtual-folder "vm" "Visit a VM virtual folder."
t)
(autoload 'vm-mode "vm" "Run VM major mode on a buffer" t)
(autoload 'vm-mail "vm" "Send a mail message using VM." t)
(autoload 'vm-submit-bug-report "vm" "Send a bug report about VM." t)
(setq vm-spool-files (list
                     (concat "imap:myserver.mydomain.edu:993:inbox:login:"
                             (getenv "USER") ":*")))
(setq vm-imap-expunge-after-retrieving nil)
(setq mail-default-reply-to "msingh@mydomain.edu")
(setq user-full-name "Madhusudan Singh")
(setq user-mail-address "msingh@mydomain.edu")
(define-key menu-bar-tools-menu [rmail] '("Read Mail" . vm))
(define-key-after menu-bar-tools-menu [smail] '("Send Mail" . vm-mail)
'rmail)
(setq mail-user-agent 'vm-user-agent)
(setq toolbar-mail-reader 'vm)
(setq vm-mutable-windows nil)
(setq vm-mail-check-intervil nil)
(setq vm-auto-get-new-mail nil)

However, on entering the right password, emacs just locks up. This is not
"occasional" as the FAQ (http://www.wonderworks.com/vm/vm-faq-4.html#ss4.3)
warns, but reproducible.

How do I fix this ?

Thanks.