Security DVR Viewing - Solve The Mystery

[K A Hall]

Solve this mystery because I sure can't. I do some work for various local security businesses that install DVR/security cam set up for others. Basically I make the remote viewing work.
I did one yesterday and when I got back to my place I logged in and it worked just as it should.
Customer calls me later with question so I log in again and it still worked just fine. During the call with customer I was messing around with the resolution on the monitor that had IE open on, viewing the live feed from the DVR just to see what kind of different results I could get. At some point I lost the video display from the cameras and could not get it to come back after several attempts logging in, restarting IE and trying again. All I could get was gray boxes where the videos laid out in a grid should have been.
I have 3 monitors so dragged the IE window to a different monitor (a new ASUS) and bam, there was the display just as it should be. Drag it back to the other one and the display goes away with the gray boxes returning or the vid freezes until I drag it back to the ASUS monitor and all is well again.
When I first tested it back at my place it worked on any monitor.
The only change I made was the resolution adjustment on the monitor but I doubt that has anything to do with it since I have 2 monitors that are almost identical and the live feed will not display on either one, only the ASUS.
The 2 monitors it wont work on now are Samsung Syncmaster 94bw and a 941bw which are both hooked up via DVI. The ASUS VH232H is connected via HDMI.
I have tried a lot of different things but none of them work. Adjusted the resolution on the monitors, removed and reinstalled the addon for IE (active x), restarted the PC and a few more but nothing is bringing the display back on the Samsungs. So I screwed something up somewhere.
Ideas?

[K A Hall]

Ha, No one. Don't feel bad. I posted it in another forum that deals with CCTV/security cams and while they had seen this before they don't know why it happens either. It turns out it's not a big deal for this customer as it works fine on their one and only monitor but I really wanted to solve it.