Problem with Sony Remote Controller (RM-U302)

Hi,
I'm using USB-UIRT which works fine with my Gilder.
The only problem is that I have a Sony remote controller which has a "SYSTEM STANDBY" button. It can give out very special infra code because it can't learn even by the Philips Pronto Pro.
No problem. The USB-UIRT will learn the code, I thought.
It did but when I test the code nothing happens.
All I'd like to do is to switch off my SONY STR-DE225 receiver.
Any idea?
Thanks for any help in advance
I'm using USB-UIRT which works fine with my Gilder.
The only problem is that I have a Sony remote controller which has a "SYSTEM STANDBY" button. It can give out very special infra code because it can't learn even by the Philips Pronto Pro.
No problem. The USB-UIRT will learn the code, I thought.
It did but when I test the code nothing happens.
All I'd like to do is to switch off my SONY STR-DE225 receiver.
Any idea?
Thanks for any help in advance