Question about Outlook Express

I have recently upgraded to a new hard drive and chose to do a clean install rather than clone my old hard drive.  I have a problem in exporting/importing my MS Live Email. 

As background I am running Windows 7 (64 bit), and Windows Live Email 2012.  When I use the WLE export feature I choose to export all folders.  I can watch as the utility is exporting in Windows Live Email format to an external drive and counting down the files in each subfolder to include my inbox and sent folders. 

However when I import from the external drive to my new install of WLE on my new hard drive not all the email sub folders are imported, notably the inbox and the sent email folder.  When I click on the export file and look at the sub folder email structure the inbox and sent mail folder are now where to be seen (even though I saw the email messages being counted down in the sub folders as they were exporting).  I have tried repairing the WLE 2012 software and re-reported/imported with the same results. 

The overall size of the exported emails folders is almost 1 GB.  The sent email has about 3600+ emails in it while the inbox has about 1600+ emails (mostly junk emails but that is for another discussion). 

Anyway how can I export the these emails?  Could it be that the inbox or sent mail  folders contain corrupted emails which interferes with creating the proper subfolder export structure?  Or are these subfolders exceeding some folder size threshold?        

Any help from the community would be appreciative.