Q: Xcode can not be install on my MBP

Xcode version: 4.3.1

Mac OS X version: 10.7.3

install log：

25/3/12 4:32:42.453 PM authorizationhost: SFBuiltinEntitled: Xcode.app is not entitled for system.install.apple-software

25/3/12 4:32:44.874 PM authorizationhost: SFBuiltinEntitled: Xcode.app is not entitled for system.install.apple-software

25/3/12 4:32:44.906 PM authorizationhost: SFBuiltinEntitled: Xcode.app is not entitled for system.install.app-store-software

25/3/12 4:32:44.940 PM authorizationhost: SFBuiltinEntitled: Xcode.app is not entitled for system.install.app-store-software

25/3/12 4:32:44.941 PM com.apple.SecurityServer: Failed to authorize right 'system.install.app-store-software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/in stalld' [420] for authorization created by '/Volumes/Xcode/Xcode.app' [414]

it actually worked before, before I reinstall my OS and upgrade my Hard Drive to SSD.(I don't know if this is the reason)

And now I can't get Xcode to work.