nnimap server not agentized at startup

[Nicolas KOWALSKI]

Hello,

Previously, with Emacs22.2 + Gnus v5.11, at Gnus startup, the nnimap
server was always agentized:

     {nnfolder:archive} (closed)
     {nntp:} (opened)
     {nnimap:} (opened) (agent)


I just upgraded my system, so the versions I have are Emacs 23.2.1 +
Gnus v5.13. Now, at Gnus startup, the nnimap server is never agentized.
I have to go in the server buffer, and re-agentize the nnimap server
manually (J a). This is annoying. Is there something I can do to get
back the previous behaviour?

My select methods are quite simple:

(setq

 gnus-select-method '(nnnil "")
 gnus-secondary-select-methods
 '(
   (nnimap ""  (nnimap-address "localhost")
           (nnimap-stream network))

   (nntp "" (nntp-address "localhost"))
   )
 )


Thanks,
-- 
Nicolas