>I have my app running on 100 plus machines. I have rgistered the wshom.ocx file on them all using the regsvr32.exe. Today I ran into a machine that will not register the dll. Can't figure out why.

It will not register if the path to the OCX is incorrect. Make sure the OCX exists in the folder where you think it does. If that is OK, what kind of machine is it? If NT/2k/xp, does the user have sufficient rights to register new controls in the registry?