Error: Undefined variable: hostName

[yogesh_gamer]

using 1.1.14 version
i installed a mod:
http://custom.simplemachines.org/mods/index.php?mod=1352

I see this error in my forum error report:
========================================================================================
Guest    Today at 09:09:50 AM
117.198.136.112      a1ec6ce08f12b33a2abe9722285e9380
http://downloadyourworld.com/index.php?action=contact
8: Undefined variable: hostName
File: /home/downlo23/public_html/Sources/Contact.php
Line: 164
=======================================================================================

please tell me the reason

[All Colours Sam]

Please for mod related issues, use the mod's support topic:

http://www.simplemachines.org/community/index.php?topic=264416.0