The latest VTI image has a problem with starting mgcamd from the VTI panel - VTI Cam Center
You can download it, and it will show up in the panel, but selecting it will NOT activate it.
Unlike CCcam which starts fine, mgcamd can be started only with the telnet command
/usr/bin/mgcamd_xxx &
or, and this is easier for most users, use the VTI panel to "start" it and then do a reboot. It will then start.
At the moment, there seems to be no fix for this issue.
xxx represents the version number. It is not the command.