A Fix : Firebug Debugger doesn't work

I spent hours in starting debugger on Firebug 1.2.1 . I didnt know what the problem was. Under script tab, I put the breakpoints on the code but none of the buttons like Run, step into, step over , step out was active. Then, I finally found in one of the blogs that something wrong with the profile Manager in Mozilla Firefox. Then the problem was fixed as I ran the firefox profile Manager.
Steps :
1.Close all the instances of firefox browser.
2.In Windows/ Start/ Run cmd: firefox.exe -profilemanager

Then the debugger started working. So, there was some problem with my profile. But still don't know what was that.Now, I can see the active debugger buttons as shown below.

Ext JS- power of javascript

Last month, my friend Bikash who is working in Washington was talking about the challenges that he had faced on binding the data on Ext js controls which I had never heard before. I was wondering what in the earth that is. Then I explored Ext js which is an extended library of javascript where most of the stuffs are in Json. When I saw the sample controls, I was awed. Oh man! Unbelievable! Superfast control! Awesome GUI!
Ext js also provides the framework library which I downloaded and installed it in my IIS and started writing Ext js.