[Solved] radgrid usestaticheaders headache problem

[Nguyễn Đại Dương]

I used version Q2-2009, and I'm trying to mimic yahoo mail site
but I have some problems with that UseStaticHeaders
when I debug my site with IE 7, in normal browser size, I have this, pretty good.
http://i20.photobucket.com/albums/b222/grandholy/mail1.png
when I maximize the browser size, I have this, not bad
http://i20.photobucket.com/albums/b222/grandholy/mail2.png
but when I turn browser size to normal again, oops, there's something wrong
http://i20.photobucket.com/albums/b222/grandholy/mail1.png
and I have 3 question
1- how to fix this problem?
2- I want my radgrid auto resize like yahoo mail, as you see, there's still a Horizontal scrollbar in it
3- If I try to click the link button in my radgrid and I'm using ajax, the first time it's looked like the page reloading, but the second click is fine, I wonder why?
oh, and one more thing, when I click in the link button first time, it's ok, but if I click the second time without scrolling, the radgrid's record position come back to 1st record , I wonder why?
this is my entire code
http://www.mediafire.com/?zm2zfknj4wu
and the problem in the Mails.ascx file =.=
please reply asap, thank you.