I am using 3.01, and so I am trying to recall what I did. Brute force approach is to delete camera and add again. Then drag it to the right location in the overview (at least, that is how I recall it).
Better solution is to get the newest version of D-ViewCam, and you will notice a major improvement in backup up and generating .asf files with a good visible OSD. Officially 3.00 is directly downloadable, but there is also a 3.01 via the taiwanese support-site (mentioned somewhere else in the main thread)...