Once fast, now the Share Review preparation process takes a very long time

[rinch at Inficon.com]

The PDF shared review process has been working great until recently. Now, 
it hangs up with the message "Status: Saving the shared review-enabled PDF 
file ..." displayed. If I touch this message, I get another "Acrobat is 
not responding" dialog. If I let the process continue for a very long 
time, say 30 minutes, eventually the process completes: the e-mail is 
posted in Lotus Notes and the Shared Review is posted in the Share Review 
internal network public server --- all is fine.
 
 Why is this once fast process now taking so long?
 
 I'm Adobe TCS2 on a Dell Precision T3500 Workstation running Windows 7 
Professional SP1 32-bit with 4 GB Memory, Xeon 2.53 GHz processor, 
graphics card is a NVIDIA Quadro 4000 (2 GB) running two 20" widescreen 
monitors.
 
 I author in FrameMaker 9.0p255 then create a PDF in Acrobat 9 Pro 
Extended 9.4.6 and send the PDF out for shared review on internal network 
public server sending the e-mail through IBM Lotus Notes 8.5.2 
(20100811.1131).
 
Thanks!
Richard