problem with character ñ

[Marcos <marcos @ second . ival . es>]

hi,
    i have created a list called     sueño
    if i try to subscribe i received a mail from majordomo about:

>>>> subscribe ri=F1on marcos@ivalles
**** subscribe: unknown list 'ri=F1on'

how can i solve that?

thanks in advance,

marcos

marcos@ival.es