spam.el puts mail into bogus group

[calmar <mac@calmar.ws>]

Hi, 
I have installed spam.el a few days ago, and I'm not able to
handle it really.

What I did is the following:

,----[ into my gnus.el ]
| (require 'spam)
| (setq
|  nnmail-split-methods 'nnmail-split-fancy
|  nnmail-split-fancy '(|
| 		      (: spam-split)
| 		        "INBOX")
|  )
`----
then a customize-group <RET> spam <RET>
there I choosed the standart settings unless that I disabled `use
 dig' actually,
and that I toggled the `use blackholes'

That's all I did.

The `split-group' variable is set to `spam'.

So why are there errors while receiving the mails (error in
fancy-splitting --> use bogus group (or similar))?

Thanks for any hint
-- 
calmar (o_         
       //\   <--- GNU/Linux is GREAT     
       V_/_       www.calmar.ws