Lion, Dell External Display, no higher resolutions !!!!!

Hi,
Apologies if this is the wrong area for this to go into... but i think this is a problem with Lion rather than anything else.
Recently got a new MacBook Pro 15" (woo hoo !!!) and its running Lion.
When i go into the System Preferences > Display, the highest resolution is showing up as 1680x1050. That's fine.
Now when i plug my Dell 3007WFP external monitor into the laptop the maximum resolution that i can select is 1280x800. It recognizes the display, but just doesn't have the higher resolutions for me to be able to select.
I didn't have this problem with my old 17" MacBook Pro running Snow Leopard.
Any ideas on what the problem might be, and how i can fix it ???
Thanks in advance for all suggestions...
Silver

Update...
Found the solution to the problem...
Basically, its nothing to do with Lion or a fault on the MacBook Pro...
All new Macbook's ship with the Thunderbolt port. So if you want to plug an external display in which is 30" or more then you need to use a Mini Display Port to Dual Link DVI adapter. I was using a Mini Display to DVI adaptar, so i was basically getting half the resolution (1280x800) !!! Now with the dual link, i have full 2560x1600 glory !!!
Liink to the device at Apple Store... http://store.apple.com/us/product/MB571Z/A?mco=MTY3ODQ5OTY
Hope that helps someone else who has the problem.

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