The image on the DoC may simply be corrupt. Get the utilities for it (mentioned in another thread, you find it) and do the following:
1. Back up the current image (in case it really wasn't corrupt and you want to restore it later.)
2. Format it and put on it whatever you wish.
3. When you get the DoC the way you want it, back up the image in case it gets corrupted.
I have had the "corrupt DoC" problem with my WebSurfer several times and had to restore my bootable image to it by booting from a HD. Of course, this requires that you can boot from a HD to start with. It may be risky, but I have been able to boot from a HD with the DoC removed, and then carefully pop the DoC into its socket in order to use the utilities on it. This is all on a WebSurfer, which only has a 16M DoC. If you try this, be VERY careful about static electricity, and don't blame me if you ruin your DoC. Again, I haven't tried popping the DoC into my WebPlayer while it's on, just my WebSurfer.