nnmail-fancy-split failing

[Seb]

Hi,

I'd like to send messages containing the string "string", possibly
capitalized and surrounded by any other characters, to end up in group
"stringGroup", so I included the following rule:

(setq spam-split-group "Spam"
      nnmail-split-methods 'nnmail-split-fancy
      nnmail-split-fancy
      '(| (: nnmail-split-fancy-with-parent)
          ("subject" ".*[Ss]tring.*" "diveMove")
          (: spam-split)
          "Incoming"))

but such messages are invariably ending up in "Incoming".  Any idea what
is wrong with this `nnmail-split-fancy' specification? Thanks in advance.


Cheers,

-- 
Seb