i have installed:
1:sony ericsson pc companion
2:SEMC_Signed usb Driver
3.updated my eclipse->available packages..

but while running program it will not detect the phone?
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A few things to try:
Make sure you don’t have one of those cheap $2 knockoff USB interface cables. I banged my head for an hour or two before I realized the reason my PC wouldn’t see my phone is because of my cable.
Drop to command prompt, type adb kill-server and then adb devices to restart the adb server.
Make sure your phone is in debug mode (settings > applications > development > enable USB debugging)