Chat does not work on iphone, using either the widget or

Chat does not work on iphone, using either the widget or the botton-of-the-page selector.

Am I doing something wrong? Is there a setting I cannot find? Surely you didn't plan to not support iphone?

If this is used for customer support, I need to sometimes respond when I am away from the desktop, using my iPhone.

Can you make this work on iPhone?