Hello,
I'm sorry you're having trouble with Display Changer. Could you submit a support request at 12noon.com and include the command line you're using? I noticed that the command line in the quoted post (dc.exe -dccmd.exe –listmonitors is incorrect--there's no "-dccmd.exe" switch), so I'd like to make sure you're not basing yours off that one.
Stefan Tucker
12noon.com