Adobe failed to connect to dde

I am getting a situation where I am getting a fatal error:  Acorbat failed to connect to a DDE server pop up box.  This happens when I open a pdf file after I open one and close it.  In other words I can open a PDF document in Acrobat and it works filne.  I then close that PDF file.  When I try to open the next PDF (after closing the first one) I get the error.  I continue to get the error for each additional PDF file that I try to open.  If I keep one PDF file open (the first one) then I don't get the error until I close all open PDF files.  I have to restart to get Acrobat to work again.

Windows 2003 server SP2 (x64)
Citrix XenApp 5.0
Adobe Reader 9.3
Adobe Acrobat Standard 9

I installed Acrobat first then reader.

Thanks,
Ken ...
SpokaneISDAsked:
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myhcConnect With a Mentor Commented:
I would remove and reinstall Adobe Reader before looking to deep into anything.
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SpokaneISDAuthor Commented:
This is an active Citrix server in a 24X7 environment so it will be a few days before I can test this.

Ken ...
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chichan1Commented:
Close out your Adobe program then go into the Task Manager.  Check for the Processes "AcroRd32.exe" still exist.  If it does, select it and End Process for all existing "AcroRd32.exe".  Afterward try opening a pdf doc then close it while monitoring the Processes to make sure that this disappears.
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SpokaneISDAuthor Commented:
After removing and reinstalling both Adobe Acrobat, and Adobe Reader I was able to fix this.  I had to install Acrobat first, then Reader.

Ken ...
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