Can't find variable: SQLitePlugin in Cordova 1.6.1

[ns-1m]

[Switching to process 2006 thread 0x2203]
2012-04-26 14:19:01.372 Cordova_SQLitePlugin_161[2006:207] [INFO] Error in success callback: NetworkStatus0 = ReferenceError: Can't find variable: SQLitePlugin

Yes, I added SQLitePlugin in the plugin.