Cannot export a Document Set larger than 50 MB

In my code, I am exporting Document Sets to be imported to another library (DocumentSet.Expot()).  The maximum upload size is 100 MB.  We have some Document Sets that exceed 50 mb.  When they are larger than 50 mb, I receive an error "Cannot export a Document Set larger than 50 MB".  This only happens in our test environment.  In my development environment, I have no problems exporting Document Sets over 50 mb.  I have found a hotfix(http://support.microsoft.com/kb/2544019) that sounds similar to the issue I am experiencing.  However, it seems more geared to sending items to the Record Center.  Does anyone have any suggestions?