Connect to Dual-Link DVI-D port on monitor using DVI-D to VGA adapter -- getting no signal

I have a T400.  I am trying to connect to a dual-link DVI-D port on my LG monitor via the VGA port on my T400 laptop. I bought a DVI-D to VGA adapter, but I am getting no signal. 
Do I need some other method or adapter or cable?  Monitor works fine for VGA to VGA connection.
Solved!
Go to Solution.

I happened onto this thread while searching for a way to connect my T400 to my wife's 27" iMac. What I learned thus far is that Atlona makes a device (AT-DP400) that will convert dual link DVI to Mini DisplayPort. But Atlona says that one's graphic card must support 2560x1440. The T400 doesn't have a DVI out (nor does my current docking station), but it sounds like one can get a docking station that does. But that won't help if my card won't support 2560x1440. So are you saying that there is no way I will be able to use the 27" iMac as a monitor for the T400?
-Rob 

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