[Mailman-Users] Mail from GioMBG > When I attempt to edit some user configuration I receive Internal Server Error (very strangerous! only on same user!)

[Gio MBG Canepa root]

I All Mailman Staff!
I have a strange error only when I attempt to modify some configurations on 
some mailman users... I can explane better:
If I go here:
http://home.9records.com/mailman/options/mailman/alkemy--at--mbg.it
I can edit the user alkemy AT mbg.it
but if I go here:
http://home.9records.com/mailman/options/mailman/alexkenji--at--alexkenji.com
I receive an INTERNAL SERVER ERROR!
NB] The alkexkenji user esist and is active like the first user alkemy!
I have this error when I click on the link of the user and at the same the 
user have the same kind of error when attemp to modify Yours mailman 
configuration by self... 
Any suggestions?

MANY Thanks!
GioMBG
-- 
Giò "MBG" Canepa - E Mail: mbg a mbg.it
Phone & Fax +39 0541 985 737 - Mobile +39 393 33 567 07
http://www.mbg.it | http://www.9Records.com
Snail mail P.O. Box 59 / 47838 Riccione Italy