Microsoft doesn't quite like the way Adobe Acrobat integrates with their Internet Explorer (IE) software, so they have placed a memory restriction on the IE program. The same holds true for AOL - all versions.
http://www.adobe.com/support/techdocs/98fe.htm
Configuring the Browser to Open PDF Files in an Acrobat
Window
If you want the browser to open PDF files in a separate Acrobat window,
configure the browser to use Acrobat or Adobe Reader as a helper application.
Then, when you select a PDF file in IE or AOL, the browser opens the PDF
file in an Acrobat window instead of the browser window.
To configure the browser to use Acrobat 6.0 or Adobe Reader
6.0 to open PDF files:
1. Exit from IE or AOL.
2. Start Acrobat or Adobe Reader.
3. Choose Edit > Preferences.
4. Select Internet in the list on the left.
5. Deselect Display PDF in Browser, and click OK.
6. Restart IE or AOL.
To configure the browser to use Acrobat 5.x or Acrobat
Reader 5.x to open PDF files:
1. Exit from IE or AOL.
2. Start Acrobat or Acrobat Reader.
3. Choose Edit > Preferences > General.
4. In the Options section, deselect Display PDF in Browser.
5. Click OK, and then exit from Acrobat or Acrobat Reader.
6. Restart IE or AOL.
Note: The next time you select a link to a PDF file, the browser may prompt you to open or save the file. If you choose to open the file, the browser opens the file in the helper application that you specified. If you choose to save the file, the browser downloads the file to the hard disk.
For more information about the general preferences in
Acrobat or Acrobat Reader, refer to the Acrobat Help.
