Nokia :: N97 WLAN - Doesn't Get Disconnected And Work

I recently got a wireless Router and now have my own wireless network in my home. I searched for it on my N97, it found it, I added it to it's known access points and set it to connect automatically whenever needed. Here's the problem: it does connect automatically, but it only works for like 30 seconds. After that, it doesn't get disconnectted, but it doesn't work anymore either. It simply downloads no more data. The website doesn't finish loading, or if I try to acces another site, it doesn't load at all (Opera Mini gets stuck on connected). I tried to disconnect and reconnect to the network manually, and that works, but only for another 30 seconds, then the same thing happens. I tried this with the N97 integratet browser and Opera Mini, with the same results.

Mind you that I'm using the same wireless network on my laptop and it works with no problems. Also, note that I did use other WLAN networks with the N97 and they as well work with no problems. It's just my home metwork the phone seems to have issue with, and I'd like to know why, and how (if possible) i can fix this.