how to change MSN home page back to USA

I use Firefox and Explorer for browser but Firefox as default. I use MSN USA as my home page when I startup…

Tonight it came up in Spanish-I believe the flag of Spain. The address is:
http://es.msn.com/default.aspx. Below the Spanish version is the American Flag with the option that says-take me to MSN US now ( indicated as: http://www.msn.com) and I can indicate by a dot in the circle, however, it doesn’t do anything.

My email is fine -no problem-just the home page has changed on both browsers..

How do I change the default country back to the US version of the MSN home page???

Please advise…

Thank you

1specialk