wmwr_cprog is an executable used to allow WMWifiRouter to work on devices that do not have actual voice capabilities, like the EM-ONE. Sometimes this application is not removed from the registry correctly when uninstalling WMWifiRouter, which can cause your phone to give you error messages.

To fix the error, you will need a registry editor, like PHM RegEdit (to use on your device itself) or MobileRegistryEditor (MRE) (to use on your computer and edit the registry over an ActiveSync connection).

Once you have launched your registry editor of choice, change the:

HKEY_LOCAL_MACHINE\Software\Microsoft\Shell\Rai\:MSCProg\1

entry from:

wmwr_cprog.exe

to:

cprog.exe

Close the registry editor, and wait two minutes - to make sure your device has saved the changes - and soft-reset your device. After the soft-reset, everything should be working as normal again.