[horde] Page Cannot be Displayed Error in Horde

[SANTOSH MADAIAH /ONESOURCE/RVR BLR]

I have used the following document to configure Horde,

http://willert.dk/geek/apache-php-rh73.html

I am able to send and receive mails, but the get the
following error,

Bottom of horde/index.php displays - 'page' directly above
|horde mail Logout| icon does not display.

I get Page cannot be displayed error.

Any ideas how to do away with this error?

Regards,
-Santosh Madaiah