database troubles in IOs

hi, im developing an app for ios and android and the following function that install db, only is working on android

var helper = require('/lib/helper');
var _rutaScriptInstall = '/mydata/db/install/dbPV.db3';
function installDb(dbname){
    try{
        var version = "";
        var db = Ti.Database.install(_rutaScriptInstall,dbname);// if database don't exist will create
        var sql =  new createQuery(dbname,'CONFIGURACION','CONF_VALUE as version',"CONF_KEY='dbversion'");
        var data = helper.convertDBTableJSON(sql);
        version = data[0].version;
        dbVersion.close();
        db.close();
        if(version != "")
            database.updateDatabase(dbname, version);   
    }catch(e){
        Ti.API.warn(JSON.stringify(e));
        return false;   
    }
    return true;
}