rossosat wrote same problem here! please fix this issue Where are you and how long have you purchased the modem. Maybe you are at the same area with the OP and should try the same with he have done .

try clear your broswer cache.

i think someone changed your settings because my modem was set to pppoe after my quick setup

100? big amount! Why not calling them. Well, it shows your location is US, why did you buy those Spanish router?

sometimes the network is stable. You can login the dyndns.org to check whether it is connect or not connect.

I think you should let it blank. you opened more than one external port so those port must be all point to one internal port or point to the same internal port one by one I think blank is to make...