Adobe Photoshop 'Save As' Action

Hi,

I'm trying to save a large number of images as jpeg. To achieve this, I've recorded a simple action that saves the file as X.jpg. I don't mind the fact that it saves the next file as X copy.jpg, but the problem occurs when trying to save the 3rd image (and other consecutive images), as instead of creating another file, it replaces the previous X copy.jpg file with the 3rd image.

Does anyone know how to instruct it to keep creating new files instead of rewriting the X copy one?