android emulator not launching

I am new to android and I have run my codes on emulator for last few days. But today morning android emulator is not launching the android console showing message like:

"Android Launch!"
"adb is running normally."
"Performing com.HelloAndroid.HelloAndroid activity launch"
"Automatic Target Mode: Preferred AVD 'Launch' is not available. Launching new emulator."

"Launching a new emulator with Virtual Device 'Launch".

I think after this console should show messages like Waiting for HOM开发者_高级运维E ('android.process.acore') to be launched... etc etc. But in my case android console show no more messages and android emulator is not loading. Anybody know the reason. I am working on fedora 13 with eclipse helios version 3.6.2

Thanks

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use this rightclick on ur project select Run As>Run Configurations switch to "Target" tab select radio button to "manual" instead "automatic" & set the emulator you want apply it & run

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Try the following two ways :

1. Restart emulator and eclipse.
2. Make new emulator and try to launch this.

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Probably there is another instance of adb running. Go to the task manager (on windows only) and end the process