a weird issue with template in Iphone

I am running a site that uses mobileJoomla
It works great
but
people who browse my iphone template with ios 4 cant see the site (the template is cut) and whoever uses ios 5 - its OK

what can I o in order to resolve it ?

What is url of your site?

its Couponq.co.il

10x.

It's screenshot of iPhone4 (iOS4.3):

You have no viewport metatag in html source.

So How Can I see it good iOS 5 ?

Your template should contain smth like

in the case of fluid width mobile-optimized content, or
in the case of fixed width desing (444px is the width of the site).