You usually get a run-time error '339' when a DLL/OCX file is missing or is not properly registered on your computer. In your particular case, the file named numberspincontrol.ocx is missing from your system.
This is a problem that can be easily solved by using an application that fixes your DLL files. Software Informer database offers access to such applications. One of them which I strongly recommend is Dll-Files.Com Fixer. It is a shareware product but you will find it helpful as its trial version allows you to find and download the missing OCX file, and correctly register it on your system.
After Dll-Files.Com Fixer performs the necessary steps, it might be required to reinstall the screensaver on your system.