I bought this modem router last week. I was able to connect to my ISP (Plus Net in UK) on ADSL2. I then upgraded to the latest firmware (ArcherVR2800(EU)_V1_200710) after which I was unable to connect

Hi, I tried upgrading my VR900 firmware to the latest version to try and improve reliability and it is not able to connect to Plusnet (my ISP). If I downgrade to the previous version it works fine. I'