Wireless configuration on Rasmbc

Hi all,

I've just got my Raspberry Pi few days ago, I bought that with tp-link tl-wn725n, as it was mentioned works out-of-the-box with raspbmc. So I've installed that OS on my Pi and I cannot make wireless works. I'm using Network Manager, which tells me it's configured, I've changed settings in raspbmc configuration to wireless, restarted my device few times and nothing. There aren't any instruction on web, as everybody claims this works

I've installed Raspbmc twice, configuring wifi network during installation and unfortunately nothing.

What else should I check? Configure?

Thanks

Piotrek