I am not able to resolve this simple issue.
I am trying to connect my device to Eclipse via USB cable.
On my PC, I have installed Eclipse and the Android SDK and
I think your emulator is in Automatic. You can change that to Manual.
Try this,
Step 1
Go to Run Configuration

You can see three Columns Android,Target and Common.

Step2
Select the Target
Step 3
Choose Always prompt to pick device.Click Ok
Step 4
Now run your project you should see the emulator and your device. Select your device and click ok.

Hope it helps.