Data retriveing issue in IE 6.

Hello everyone, I'm developing a small webpage using ASP.NET and AJAX. Now i
have runed into a dificult problem. My "User login" script is working
good under Firefox but when running in IE, when pressing login button it can't
retrieve data from the textbox-es. 

 Any ideas how to fix this?


P.S. By not being able to retrieve data i mean that using debugger the
username.Text - shows that it has nothing in it, so it's probably a IE postback
issue.