Online account to use a LabSql vi, I create a connection and database in accordance with the instruction of the it, use it to provide the test of vi, error as a result, the following figure,

Baidu to is to delete the table and then rebuilding, I performed in navicat this sentence and successfully, but back to the testing vi or not,
According to the step program block diagram, seems to be no database connection, which is I, please step out of the question? What to do?