All links on Facebook App are not clickable

IN PROGRESS
Bids
3
Avg Bid (USD)
$145
Project Budget (USD)
$30 - $250

Project Description:
Hello,
I have Facebook App and web site.
Facebook App : http://apps.facebook.com/youandischool/
Web site : www.youandischool.com
In Facebook App, we insert website url to Canvas Url
Until a few weeks, Facebook app and web site are working well. i think.

My Problem seems to be Iframe issue (target issue) or Facebook bug.
1) Web site is still working well.
2) In Facebook App, when i click all links, these links didn't work well.
But, when i open with new window, it would work well.
I recognize this problem is target problem in html.
So, i forcefully put the "base target = _top" in every page.
After that, links problem was solved in almost Browsers (Chrome, FF, Safari, etc...)
But other issue happened.
I think it's not good solution.
So, i removed base target tags.

Could you help?
I think it's not server issue and program issue because .... when i click one of all links on FB app, no traffic to our server.
Our System is made by JAVA, Spring framework.

Brian.

Skills required:
Facebook Marketing, HTML, Java, Javascript, JSP
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