Ok, if you have changed nothing then it is the remote that's at issue. The first three buttons on the left are dedicated to control Meridian equipment.
These will correspond to the first three on your old MSR.
The old LP button is the new DVD button. (3rd from left) the buttons are interchangeable so be mindful of how they are labeled.
If you press this to select DVD you should have control over the 596. To operate some functions you may have to also press "function" as well as the operation button.
As long as you used the LP button on your old remote originally.
Hope this helps, Chris
