Hmm.. have you tried using these commands without this batch file? Separate it into individual batch files and kick off each instance one at a time. If that fixes the problem, you'll need to use some sleep-style commands between your batch calls to Maximizer.exe - I use ping for 5 seconds between each call for each window to be placed in the correct position. Are you using horizontal span? I don't know if there could be some issues with this on two different resolution monitors since I run my 1920x1200 & 1680x1050 in dual-view mode.