Controls dissapearing in frames

[BOOMER]

I have an aspx page which contains some drop down box, text box and a link button and a frame on the same page.The frame loads another aspx page say Page2.aspx.When I click the link button, the data from the drop down and text boxes are added to database and the Page2.aspx reads that data from database and displays it in the frame. I have a delete button which is programatically added in the frame.Problem: The moment I click the delete button, the entire controls in the frame vanishes and the event handler of link button also doesn't get fired. The web application is being tested in mozilla.What could be the problem?