problem with àèòì...: how resolv?

Hallo,
I have problem with àòèìèéò... how to resolv it?
When i do the dump of db with phpmyadmin it return me a bad file.
How declare the table, char, varchar... to solve thi problem?
Thank you in advance for the time you'll spend for me.
Mario.

> I suspect you're encountering a character set issue and are depending on
> the tools to be more transparent to character questions than they really
> are. Chapter 10 of the appropriate version of the manual for your
> installation would probably be a big help to you.

Thank you!
This should be the solution... but wich set of characters should I chose?
Thankyou in advance,
Mario.