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

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

Try the following two ways :

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

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