wireless connection problem?

Hi, my father changed the internet service provider a few days ago, before this I had wireless conection with another ISP and SL worked fine, now with the new ISP I can connect and walk around but if I try to edit something with a lot of prims, then I freeze and I have to close the window, sometimes I also log in and became the "white fuzz" and then I get logged out.

So I was wondering if any of you have ever had this problem and if you have any idea what is this about?

Another thing to be mentioned ,my connection appears often as "identifying" at random times.

I would try bypassing the wireless router first by plugging directly in to the modem with a cord. Wireless never seems to work as well as good old fashion wires. Try one of those speed test sites to compare them too. If you are still getting a crappy connection you may need to get your service provider to check your levels.