Just tried the Thread3D and it worked OK for me, that said I tend to use the Thread tool (The 3D objects one not the SDK/Add-on). I also tried the parametric symbols (both 2d and 3dwhich also worked OK.
Obviously I don't know what you have already tried, so. This is just guess, but. I am wondering if its a permission thing. Some ActiveX stuff can be blocked by Windows, if not in Admin mode. so wondered if you are running as Admin, or if you have multiple users set to a slightly restricted UAC (user account control). Have you tired running TC in Admin mode (set in MS windows), or tried re-installing the symbols as Admin.
I have no idea if the above will make any difference, as I am the sole computer user and automatically set as Admin, even though I don't install TC etc. as Amin.