There is a popular problem when you install Acrobat from CS4 on a W7x64 sys, that you don't get the usual Adobe PDF print
driver auto installed. You have to install the printer manually and I found these instructions to do so on the Acrobat Community forum (which worked fine for me on two systems):
•Click your Start Button and select Control Panel
•Select Devices and Printers
•Select Add a printer
•Select Add a local printer
•Check Use an existing port and select Documents\*.pdf (Adobe PDF) from the drop down. Click Next
•Click the Have Disk… button
•Click the Browse… button
•Navigate to C:\Program Files (x86)\Adobe\Acrobat 9.0\Acrobat\Xtras\AdobePDF
•Select AdobePDF.inf from the list, then click the OK button
•You will see many Adobe PDF Converters in the list, however count six down from the top and click Next
•Name your printer, in my case I named mine Adobe PDF
•Follow the rest of the prompts