jquery not functioning, whats up with IE9 ??

Howdy,

Please help me with a clue on my issue-

Have created a huge app in Firefox, Chrome and also in Safari where all works fine.

I moved to IE anticipating a few bugs, however nearly nothing of my jQuery functions.

For verifying, I created an easy page to check basic jQuery and it still doesn't labor-

$(document).ready(function(){
    $("#click").click(function(e){
        e.preventDefault();
        $("#tester").show();
    });
});

Have also concealed a div on my page and desire to demonstrate it and it doesn't labor.

Pls help me.

Thanks much