Try to reach:
http://fasanen.altervista.org/test_protected/index.html (It is a free altervista account)
Error 500 :( An error occurred. This error may be due to an erroneus .htaccess file, added by you or by a script in the current directory.
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In the folder "/test_protected" is the file ".htaccess":
AuthType Basic
AuthName "test"
AuthUserFile /membri/fasanen/test_password/.htpasswd
Require valid-user
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In the folder "/test_password" is the file ".htpasswd"