AIR installation issue

I have Mac OS X (10.7.2), my air application was crashing on start. To fix that I uninstalled that AIR application and AIR runtime, and now trying reinstall runtime but when I click on "Adobe Air Installer.app", it show following error. I also tried installing latest beta from labs as well.

This application requires a version of Adobe AIR which cannot be found.

Please download the latest version of the runtime from

http://www.adobe.com/go/getair,

or contact the application author for an updated version.         

In Console it prints following:

12/19/11 3:09:06.685 PM Adobe AIR Installer: Runtime Installer begin with version 3.2.0.1320 on Mac OS 10.7.2 x86

12/19/11 3:09:06.685 PM Adobe AIR Installer: Commandline is: -psn_0_733363

12/19/11 3:09:06.685 PM Adobe AIR Installer: No installed runtime detected

12/19/11 3:09:07.884 PM com.apple.launchd.peruser.1151718425: ([0x0-0xb30b3].com.adobe.air.Installer[930]) Job appears to have crashed: Bus error: 10

12/19/11 3:09:08.020 PM ReportCrash: Saved crash report for Adobe AIR Installer[930] version 3.2 (3.2.0.1320) to /Users/shahid/Library/Logs/DiagnosticReports/Adobe AIR Installer_2011-12-19-150908_machine.crash

Thanks,

shahid