Ok, I would be a little careful here. If you flash your router with the wrong firmware it could end up useless. I can't decide for you, but I'm always very carful when flashing devices.
/Harald

First find the firmware (6.1.0.5) at http://www.speedtouchforum.de. You'll find the firmwares at: SpeedTouch Firmware -> Firmware Archiv. You'll find the upgrade wizard in the version 5 firmare zip-files. Then you'll need to downgrade (not upgrade) your Speedtouch. I found this desciptive instructio...

Downgraded my SpeedToch 585v6 firmware from 7.4.3.2 to 6.1.0.5 and everything now works flawless!! Both Roku and iTunes finds my ReadyNAS Firefly MediaServer without problem! Firmware found at speedtouchforum dot de.

FAULT DESCRIPTION I have my ReadyNAS attached to the SpeedTouch router via wire. On the ReadyNAS I have Firefly Media Server running. My Roku Soundbridge is attached to the SpeedTouch router wireless. When turning on the SoundBridge it is possible to listen to internet radio but it is unable to find...