VHD failed to attach to VM

I'm running Core Server 2008 R2, with several VM, managed by HyperV. I have a .vhd file (37Gig) that I want to attach to a VM. The free hard drive on Core is 90Gig. However, after I created a VM (2Gig of RAM) and attach that .vhd (37Gig) to the VM, the pop-up error warning came up:
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"Error Applying Hard Drive Changes

Failed to add device 'Microsoft Virtual Hard Disk'.

Cannot open attachment '\\Core2008R2\C$\Virtual Harddisks\TS2008.vhd'.
Error: 'The requested operation could not be completed due to a file system limitation'

Cannot get information for attachment '\\Core2008R2\C$\Virtual Harddisks\TS2008.vhd'

------------------------------- etc. 3 more paragraphs with the same messages-------

Any idea what went wrong?
lineonecorpAsked:
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lineonecorpConnect With a Mentor Author Commented:
Resolved the issue.  VHD had to be referenced as a drive letter not a UNC path e.g.

wrong way: \\2008core\c$\Virtual Harddisks\XP02\XP02.vhd

correct way: C:\Virtual Harddisks\XP02\XP02.vhd



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Luciano PatrãoConnect With a Mentor ICT Senior Infraestructure  Engineer  Commented:
Hi

Check here how to bypass this issue

http://www.expta.com/2010/06/unable-to-compact-vhd-due-to-file.html

Hope this can help

Jail
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lineonecorpAuthor Commented:
Thanks for the links, but I don't use any compression or compact folder/drive or whatever that is.

Other thing that I just tried:
I made an experiment on the VM that is already working and attached to a .vhd file. I detached it, and re-atached it, now it gives me the same message. I couldn't get it back to work.
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lineonecorpAuthor Commented:
Solved issue myself.
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