Hello. By now my wifi used to support my Pokemon game Soul Silver, for quite a long time actually. Gradually the game's itself ability to connect to the wifi became loose- it could work frequently for a length of a few days, and then be disabled for the same period of time for the next week. I talked to my router's company to make sure that my security is set to WEP, but it still isn't working. We've also tried to completely remove any option of security but still there's no change in it. Sometimes my game had recognized my own access point and the connection test was successful but when I opened the game itself it just lost its connection once again.

Does anyone know what I can do to fix this?