Not printing acrobat files from Reader 9.4/Win 7 64 bit

Question

I have just had to get replacement PC with Win7 64 bit and have loaded Acrobat Reader 9.4.(Prior to demise of old PC Win XP SP3 and Reader 9.x)  I have an HP Deskjet 960c printer connected through a NAS as a network printer.
I have problems printing acrobat files  PDFs (which used to print on old PC) to that configuration. I open document (displays fine), select print, press OK. Goes through spooling doc - 100%.; Then nothing happens - nothing shows on doc list on printer - JUST GETS LOST IN THE ETHER.
Same file prints on printer if direct USB connected. 
Word/Excel files print both through NAS as server and on direct usb connect.
Still printes from another XP machine fine.
Tried XP compatibility no change
ONLY does not seem to work on printing PDFs via NAS Print Server.
Help appreciated
as1440

Answer 1

Ok, I have now gotten Reader 10 installed, can open files from my desktop but IE 9 keeps crashing when I try to open PDF files even though I exited and relaunched IE 9.  I did take ownership of all the folders containing Reader 10 and then clicked OK when I got the error notice about the shortcut being installed. I did make a copy of the crash error report and it reads as follows:
Problem signature:
Problem Event Name: APPCRASH
Application Name: iexplore.exe
Application Version: 9.0.8112.16421
Application Timestamp: 4d76255d
Fault Module Name: IEFRAME.dll
Fault Module Version: 9.0.8112.16440
Fault Module Timestamp: 4eb319a7
Exception Code: c0000005
Exception Offset: 001b174b
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
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Any help is greatly appreciated!