It didn't work in my machine.. went through some blogs to know that, I need to try on 32-bit..
anyways we need to have .0002 for amber update.. thts what the discussion is abt.. :-)
NSU didn't detect L620 in Windows 7 64-bit machine.. had to use a 32-bit Windows 7 to upgrade to .0002 firmware.. Then was able to install Amber update.. :)