error while using PRAGMA

[Yohi]

Hi

i got this error
com.google.gwt.gears.client.database.DatabaseException:
SQLite prepare() failed. ERROR: authorization denied DETAILS:
not authorized EXPRESSION: PRAGMA page_size = 4096 : at ..null..

while execution this code

execute("PRAGMA page_size = 4096 ");

please help me to solve this problem

Thanks
Yohi