IFrame acting like a crap

[foez]

There is this problem I have been facing with Iframes. Whenever I load some url in an Iframe in a page. When I open the page later, the links inside the Iframe doen't work properly. Some links cannot be clicked which is easily accessible without the Iframe, but inaccessible inside an IFrame. That is the links in original web page works fine if I visit it directly, but if it is loaded inside an Iframe in some other page, some links just cannot be clicked.
eg. http://www.farhadz.com/foez/ecard lot of links inside the Iframe here doesn't work corectly, while they works fine in here http://pub50.bravenet.com/postcard/post.php?usernum=4237226045
Why does it happen? And how can I solve it? Any ideas?
I use frontpage Xp.

[KDLA]

Validating your coding might help: http://validator.w3.org/check?verbose=1&uri=http://www.farhadz.com/foez/ecard/.

KDLA

[foez]

Didn't understand the validation thing.

[welsh]

those errors are problems with your site. fix them. also you dont have a doctype.