wlan scanner XP-305

Hi everybody,
I just acquired a new Epson XP-305 printer/scanner. It is available on my WLAN. I’m using the ASUS RT-N56U router. I’m running opensuse 12.3. While the printer is working fine the ‘net’ driver doesn’t find the scanner. ‘iscan’ and ‘iscan-data’ packages are installed. I switched off all firewalls. It still doesn’t work. I suspect that the router has a setting which I haven’t found yet that would do the trick. Any suggestions, please?