If you are using Microsoft's Internet Explorer, or you are an AOL user, and the file you want to see shows a ".pdf" suffix (Portable Document Format) in the address window of the blank screen, try the following workaround taken from the Adobe site:
Enabling the Browser to Use Acrobat as a Helper Application
To configure Acrobat or Acrobat Reader as a helper application:
1. Exit from Internet Explorer or AOL.
2. Start Acrobat or Acrobat Reader.
3. Choose Edit > Preferences > General (Acrobat 5.0 or Acrobat Reader 5.0) or choose File > Preferences > General (Acrobat 4.x or Acrobat Reader 4.x).
4. In the Options section, deselect Display PDF in Browser (Acrobat 5.0 or Acrobat Reader 5.0) or deselect Web Browser Integration (Acrobat 4.x or Acrobat Reader 4.x).
5. Click OK, and then exit from Acrobat or Acrobat Reader.
6. Restart Internet Explorer or AOL.
Note: The next time you select a link to a PDF file in Internet Explorer and AOL, a dialog box will prompt you to specify what to do with the file. If you select "Open this file from its current location," Internet Explorer and AOL open the PDF file in Acrobat 4.0 or later or Acrobat Reader 4.0 or later as a helper application. If you select "Save this file to disk," Internet Explorer saves the PDF file to your hard disk, from where you can open it later.
Downloading a PDF File to Your Hard Drive
You can download PDF files to your hard drive from a Web page's link, and then copy text in the file, distribute the file, or save the file to a disk.
To download a PDF file from a link:
1. Right-click the link to a PDF file, and then choose Save Target As from the pop-up menu.
2. In the Save As dialog box, select a location on your hard drive, and then click Save.