Hm, bit strange. Did you check the logs of your webserver?
/var/log/apache2/error.log
or
/var/log/apache2/access.log
Can you reach any other page on the phpmyadmin machine? Just create a file with somtehing like
Code:
<h1>here we go</h1>
name it index.html and put it in the document root of your webserver. A connection to 192.168.1.1/index.html should give you the above line....