First right click of on your project
->Run As -> Run configration
Now Select the Target Tab and Click Radio button "Always Prompt to pick up the device"
Now you should have to install Google Usb Driver from the SDK manager.
Now you must allow usb debugging on device.Go to Settings->Application->Development(on API level 10).Also one more thing your min/max/target must be equal to your device(android:targetSdkVersion="10") in your AndroidManifest.xml.
After Doing these steps again run your app from eclipse with your mobile connected you will find your mobile like this
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