VersionCue.dll missing in CS4

Hello,

I'm a brand new Adobe user who just purchased CS4 Production Premium.

I wanted to batch process a bunch of jpegs using a custom action I created in Photoshop. I created an action to change the brightness/contrast to 20/100 respectively. I then used Bridge to select a series of Jpegs and then ran Tools->Photoshop->Batch and chose my custom action. I chose all defaults and hit okay and I get this dialog box:

Error: The specified module could not be found. C:\Program files (x86)\Common Files\Adobe\Adobe Version Cue CS4\Client\4.0.0\VersionCue.DLL

What is this thing and where do I get it?

Thanks for any clues
-Julie