VGA cable pixel distortion with Acer Monitor

Greetings:
Here is my problem:
     1. With my home office configuration, my MacBook is needs a 10ft cable to reach my monitor.
     2. Because of this, I cannot use the Acer monitor cable provided from the manufacturer.
     3. I've had to buy two different VGA cables and neither of them work.
     4. Here is the problem: For some reason, when you close the MacBook and use the external monitor, the display gets stretched. This only happens when the laptop is fully closed. When it is open and utilizing both monitors, it is fine. Also, When the laptop is open, I have more pixel display options available on the Acer than when the laptop is closed.
I bought a high end VGA cable and I know it is able to carry the correct pixels because my HP works just fine on it at 1600 x 900.
Is it the cable? Or is there a glitch with the MacBook????? Is there a special cable I need to order???? Please help!
Thanks,
Jon

Hi DoriOh,
Welcome to the Support Communities!
The articles below may be able to help you with this.
Click on the links to see more details and screenshots.
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
http://support.apple.com/kb/ht3382
Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display
http://support.apple.com/kb/ht3131
OS X Mountain Lion: About the Display pane of System Preferences
http://support.apple.com/kb/ht5369
Cheers,
- Judy

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