"Not enough server storage is available to process this command"

I recently upgraded an external USB hard drive from a 500GB drive to a 750GB drive.  I share this hard dive (which is connected to may domain controller server) and I map a drive letter to it on my exchange server.  After I upgraded the hard drive, my exchange server can no longer connect to it.  It can see it, but when I try and connect or map a drive to it, I get the following message:

\\server\g is not accessible.  You might not have permission to use this network resource.  Contact the administrator of this server to find out if you have access permissions.  Not enough server storage is available to process this command.

I have check the rights to the hard drive, but everything seem fine (I have the everyone group having full control).
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jbobstAsked:
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David-HowardConnect With a Mentor Commented:
Microsoft has an article on your listed error message.
http://support.microsoft.com/kb/225782
In short this requires modifying or creating a new Registry value.
    * Start
    * Run
    * regedit
    * Navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
    * with the Parameters folder selected, right-click it
    * go to New and click DWord Value
    * type IRPStackSize exactly as displayed
    * change base to Decimal
    * Set the value to 30 (example). You may want to go in increments of 1 or 5.
    * close out of the registry and reboot the server.
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jbobstAuthor Commented:
I should have mentioned that I did make this modification, and it didn't help.  Thanks for the link though.
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