DBI - SQL Server - DAC Connection

I am running Activestate Perl 5.8.9 on Windows 7. I have been able to establish a connection to MS SQL Server using DBI for years. What I need now is to establish a Dedicated Administrator Connection (DAC) to SQL Server via DBI. I can establish a DAC connection to SQL Server using "sqlcmd" in a cmd window by prepending "ADMIN:" to the server name or by using the "-A" option, and this works fine.  When I prepend "ADMIN:" to the server name in my DBI connection string I get the following error message: 
DBI connect('Driver={SQL Server};Server=ADMIN:localhost\SQLEXPRESS;Database=pubs','sa',...) failed: MicrosoftODBC SQL Server DriverDBNETLIBSQL Server does not exist or access denied. (SQL-08001) state was 08001 now 01000  When I add the DAC listening port to the end of the server name in my DBI connection string I get the following error message: 
DBI connect('Driver={SQL Server};Server=localhost\SQLEXPRESS,60488;Database=pubs','sa',...) failed: MicrosoftODBC SQL Server DriverDBNETLIBInvalid connection. (SQL-08001) state was 08001 now 01000  
I have tried Super Search and Google, and have come up empty.
 
Does anyone know how to establish a DAC connection to SQL Server using DBI? 

Thanks,
Roy Fulbright
 
Also posted on Perlmonks at: http://perlmonks.org/?node_id=1050822