LG AX-490

I don't know about you, guys. But i've just got this phone and i've tried to download a customised MIDlet and the phone doesn't install the application on itself.
I'm trying to get some explanations about why it doesn't work but after sell the stuff, the company doesn't help us anymore.
I'm very disappointed with this phone. I think i will destroy this phone and ask my insurances to give me another model.