Now My final Application.html file contains are

< !DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/DTD/strict.dtd">
< html xmlns="http://www.w3.org/1999/xhtml" xmlns:fb="http://www.facebook.com/2008/fbml">
< head> < meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> < /head>
< body>

< script type="text/javascript" language="javascript" src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php"> < /script>
< script type="text/javascript"> FB_RequireFeatures(["Connect"], function(){ var x=1; } ); < /script>
< script src="http://static.ak.connect.facebook.com/connect.php/en_US" type="text/javascript"> < /script>

< /body> < /html>

My Java code for LIke Box is as follows FBPageFanWidget.java

class FBPageFanWidget extends Composite {

public FBPageFanWidget() { VerticalPanel mainPanel = new VerticalPanel(); mainPanel .getElement() .setInnerHTML( "< script type='text/javascript' src='http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US'>< /script>< script type='text/javascript'>FB.init('');< /script>< fb:fan profile_id=\"113106068709539\" stream=\"0\" connections=\"10\" logobar=\"0\" width=\"244\" height=\"240\" css='http://127.0.01:8080/webapplicationname/facebook.css?1'>< /fb:fan>");

    initWidget(mainPanel);
}

}

We used proper facebook API_KEY & PAGE_ID

It's very important for us to Show Facebook like Box in Our web application Because we have more IE users.

If we add FBPageFanWidget.java in our web applicaton then Our Home page is not display in IE because we add Facebook LikeBox

so we made changes in Our FBPageFanWidget.java

class FBPageFanWidget extends Composite {

public FBPageFanWidget() {

VerticalPanel mainPanel = new VerticalPanel();

if (!isIE())

{

    mainPanel.getElement()

            .setInnerHTML("<script type='text/javascript' src='http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US'></script><script type='text/javascript'>FB.init('');</script><fb:fan  profile_id=\"113106068709539\" stream=\"0\" connections=\"10\" logobar=\"0\" width=\"244\" height=\"240\" css='http://127.0.01:8080/webapplicationname/facebook.css?1'></fb:fan>");

} initWidget(mainPanel); }

public native String getUserAgent() /-{ return navigator.userAgent; }-/;

private boolean isIE() {
    return (getUserAgent().indexOf("MSIE") > -1);
}

}

when we did this changes Then Facebook Like Box display in every browser excluding IE6 - IE8 :(

and also display Our Home page in IE8 excludeing Facebook Like Box.

It means There is probelm in IE ? or what changes i need to do in my html file or java file to show facebook like Box properly with displaying our home page

It's very important for us to Show Facebook like Box in Our web application Because we have more IE users.

Please Reply ASAP.

Hope-for Best Co-operation from your side !!!!