IE 7 Display Issues

We have an application working fine in IE6. Some of our users have gone to IE 7 and our pages are all messed up. The functionality seems to still be working but the display is totally off. For instance, when having a grid on a page and buttons below, the grid now covers the buttons, where in IE 6 the buttons were below the grid. Help - we cannot use our applications as is!!!

Thanks in advance!

What version of dhtlxGrid do you use? Can you please provide us screenshot and sample of code where we can reproduce this issue?