problem with action converting PDFs to TIFFs

I've got problems with an action I'm trying to set up and would be really grateful for any help you can give me.

I've got a folder with about 200 pdfs in (all single pages as I've split them as such). What I want to do is set up an action that opens them in photoshop, converts them to a bitmap and saves them as a TIFF. Easy right? Nope.

I've set this up by recording the action. What happens is it opens all the files in turn and changes them to bitmaps as I want, but when it saves them, it saves them all with the same file name, which is the name of the first one (the one I recorded the action with), this means it keeps replacing the first file.

Obviously what I want it to do is to save each file with it's own file name!

Help! :confused:

Please!!