Connecting mini mac to 2009 20" imac

I am trying to connect a mini mac to my 2009 imac with 20" monitor via Thunderbolt wire. In the system inbformation dialogue window the status is no hardware found. I have attached a screen capture for reference as well as a screen capture about the imac. Please advise....

From this link:
http://support.apple.com/kb/HT3924
You find the following:
A supported iMac with OS X 10.6.1 or later. The table below shows iMac computers that support TDM, the required cables, and the port of the computer to which you are connecting the iMac.
iMac Model
Cable Supported
Port on Source Computer
iMac (27-inch Late 2009)
Mini DisplayPort to Mini DisplayPort
Mini DisplayPort or Thunderbolt
iMac (27-inch Mid 2010)
Mini DisplayPort to Mini DisplayPort
Mini DisplayPort or Thunderbolt
iMac (21.5-inch, Mid 2011)
Thunderbolt to Thunderbolt
Thunderbolt
iMac (27-inch, Mid 2011)
Thunderbolt to Thunderbolt
Thunderbolt
iMac (21.5-inch, Late 2012)
Thunderbolt to Thunderbolt
Thunderbolt
iMac (27-inch, Late 2012)
Thunderbolt to Thunderbolt
Thunderbolt
The 20" 2009 does not support target display mode.
The only other way to use the iMac as a display is over
ethernet via Screen Sharing or some other VNC or remote
monitor software. 

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