I can't get connection to my wireless network with HMP2000.

I have tried to change my wireless router encryption to WPA-TKIP, WPA-AES, WPA2-TKIP, WPA2-AES and then totally without encryption (open network) with no luck.

Is there any software upgrade or some other way to get this mediaplayer to work? It's totally useless without wireless network connection.

My wireless router is Buffalo WHR-HP-G54 and it's software is DD-WRT v24-sp2 (08/07/10) std - build 14896. It has been checked with other devices that it works as it should.