Internet explorer 7 and 'fixed'

This page is HTML 4.0.1 Transitional go to the strict version.
This DIV is 'fixed' at 10px from the top and is 200px high.

This one has margin left and rifht 'auto' and should stay centered.

This DIV has a margin-top of 250px. A 50px high white band should be visible between this DIV and the fixed DIV.