iframe on android-chrome

the following web page contains an iframe which should display a calendar within the content area of the page.
On all desktop browsers it works fine (as evidenced by browsershots), and iPad works fine.
Android Chrome displays a 404 not found, seemingly having removed the domain name.

i've tried adding a filename at the end of the URL   "index.php" (anything after "calendar" is ignored by the calendar server)
thinking that chrome mobile might need a file name, but that did no good.

the iframe is
<iframe  frameborder="0" src="http://www.vrbo.com/233062/calendar/index.php" height="1100" width="900"> </iframe>

and the page is:
http://oceansedgemaine.com/availability.php

any suggestions on how to trick android chrome into displaying the iframe?

thanks!