Batch Processing - Acrobat XI Pro - Freezed

HI eveyone,

I am trying to do Batch Processing in Acrobat XI Pro the same i do with Acrobat 9 PRO. What i aim to achieve is to Export the PDFs to PostScript but when working on a bigger volume ( more then 700 letters) it freezed up. Normally we are working with 3500 letters per batch. Any resolution to this?

or am i doing the wrong procedure on doing the batch processing in XI Pro?

here is my procedure: New Action Wizard > Save & Export > then i specify my settings to convert my folder to PostScript.

please help..

thanks

anthony