PST Capture tool import not working

Hello Experts

I am trying to import some PST files to new exchange 2010 using PST Capture console.
required role permissions are added for administrator user which is PST Capture installed by and being run as.

i got very first test PST of 4GB that i am trying to import to my exchange 2010 archive mailbox. it shows trasnferring 10%, 50 % and goes up to 99% then gives me an error as below.
"Import error: Could not load file or assembly 'System.Core, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified."

any advise please thanks
H-SinghTechnical DirectorAsked:
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H-SinghConnect With a Mentor Technical DirectorAuthor Commented:
my issue is resolved now, problem was i was using outlook 2010 32bit so i had to uninstall outlook and PST capture.

then install outlook 2010 64bit and install capture PST, now importing fine.
DJ2liveUKConnect With a Mentor Commented:
what happens if you perform a scanpst.exe on the file?  could be corruption in the pst causing the issue.

H-SinghTechnical DirectorAuthor Commented:
I can try that but PST is working fine i just took it offline from my mailbox.

anyway i will try that or i got 50 another PSTs to do :-)
H-SinghTechnical DirectorAuthor Commented:
done PST scan that did fine some errors and repaired, may be it got corrupted while copying, thanks.

now while importing it gave me diffrent msg, "error opening mailbox"

looks like something to do with permissions but administrator have full access rights to my mailbox.
H-SinghTechnical DirectorAuthor Commented:
had to install outlook 2010 64bit in order to get it completely working.
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