IMPORTANT NOTE :
- Do not upgrade directly from 1.0.5 (and earlier) to 1.4.4.
- Due to differences in the Web UI and functionality the router MUST first be upgraded to at least 184.108.40.206 prior to upgrading to 1.4.4.
- Upgrade your router to Version 220.127.116.11 or later first, and afterwards upgrade the router to Version 1.4.4
Check out the original post from DrayTek HERE