Agradezca a su por el elogio/Agradeça o seu pelo cumprimento
There are more factors involved than only the DIR655 router. I suppose you have a modem too that connects you to the internet? That can also be the culprit. And even the ISP can be the problem. But that is something we cannot see from here, lacking all kinds of information.
Hopefully in a language you understand: Please get somebody to help you on your location to figure out/pinpoint your problem and who does have a basic knowledge of networking. We all really like to help you solving your issues, we don't need everybody to be on the same tech-page, but having the same book would be nice.
