Problem with Authenticating on sharepoint site from Intenet

Hello,

Firstly, i'm sorry for my bed english. i use sharepoint foundation 2010.  i activate annonymous access, and access from internet. my problem is i can't authenticate on my site from internet, however my admin login and password are corrects !!

example : adress of my site http://myhost:123654/myNameSite

for authenticating i use : http://myhost:123654/myNameSite/_layouts/authenticate.aspx, that show me a popup with login and password.

thanks.