Page 1 of Windows Media Player 10 - problem ripping CD`s into smallest MP3 file size - 128Kpbs

I am having a problem ripping CD`s using WMP10 with the smallest file setting. When I set the file size to 128kpbs, insert a CD I get the following error message Windows Media Player cannot rip the track because a compatible MP3 encoder is not installed on your computer. Install a compatible MP3 encoder or choose a different format to rip to (such as Windows Media Audio)..

I can set the file size to the next size up -192 kpbs and it works fine. I tried to follow the Help advice which was suggested the registry setting on my (Dell Dimension 3000) computer is preventing Windows Media Player 10 from ripping into the MP3 format at a quality setting of 128 kbps. The solution was to delete the windows registry setting that stopped me using the lowest setting. For some unknown reason, my Dell does not show this registry key - HKEY_LOCAL_MACHINE\Software\Microsoft\MediaPlayer\Settings\MP3Encoding

Any suggestions would be appreciated.