If you have received the download link to the R1 beta firmware but your version of DumaOS is lower than 1.03.6 (for example, 1.03.3), then there is a high probability of you permanently breaking your router when upgrading. (To check your firmware version, follow this guide).
To solve this problem, we need to run a simple fix on your router. Please follow the instructions here to allow us to do this. Once you have done this, please post in this thread to ask us to get your router ready for the upgrade. You do not need to post your IP address.