qml openDatabaseSync failure on s60 v3 fp1

I installed qt_installer.sis and sqlite3.sis
I copy the code from "declarative/sqllocalstorage/hello.qml"
I created a qtquick app and packaged into sis. (use the command "qmake-symbian" and "make sis" on ubuntu10.04)
But it can not get the right results,It has been shown "?"

in code:

var db = openDatabaseSync("QDeclarativeExampleDB", "1.0", "The Example QML SQL!", 1000000);
text1.text += "\n"+db.version //I can got the version, I thought openDatabaseSync should be successful

But when i modified the OfflineStoragePath use "viewer.engine() -> setOfflineStoragePath ("E: / / DB //");",I found app just created a ini file, but no database files.The openDatabaseSync function also failed

on my ubuntu 10.04, it runs on the emulator ok.

A few days ago, I used the same code to run successfully on my E71, but now the problem appears, the new APP can not use the database in qml.