Error in MySQL Administrator when i try to change the user information

[Hans Stoelting]

I recently install the MySQL 4.1.8-nt-max, and the MySQL Administrator, but when i try to change the information (name, description, email, etc.) in the Administrator I get the following error:

" Invalid UTF-8 Error executing query (illegal mix of collations (latin1_swedish_ci,implicit)
and (utf8_general_ci,coercible) for operation '=' "

Before it happens the Administrator crash down ...

Im from Mexico, so my Windows XP regional configurations are spanish / latinamerican.

Any ideas about it?

Ing. Hans Stoelting Vaillard
IT Manager
DAPESA
San Rafael, Ver. (México)