my code skips a part

My code skips the part where it reads the table from another database. It has to use the for each for my code to work. When i use a different database kind it works but with sqlite it can't read the insides of the database. The whole code is to migrate databases to different programs.

DataTable schemaUserTables = m_objDbSource.GetSchemaUserTables();
DataRow[] sortedUserTables = schemaUserTables.Select("TABLE_NAME <> 'sysdiagrams'",
                "TABLE_SCHEMA ASC, TABLE_NAME ASC", DataViewRowState.CurrentRows);
foreach (DataRow schemaUserTable in sortedUserTables)
{
    object oSchema = schemaUserTable["TABLE_SCHEMA"];
    if (Convert.IsDBNull(oSchema))
    {
        m_clbTables.Items.Add(schemaUserTable["TABLE_NAME"]);
    }
    else
    {
        m_clbTables.Items.Add(schemaUserTable["TABLE_SCHEMA"] + "." + schemaUserTable["TABLE_NAME"]);
    }
}