network problem exe gnu/linux

OK, i,m using exe/gnu wheezy version ( which rocks harder than a very hard thing. ). nothing can access the web. synaptic, kmail, konqueror, firefox nothing. ping don't work nothing. network configured with ceni. i've not changed the settings. my connection is through my android phone tethered. now here is where it gets interesting , tor browser works without any problem whatsoever. so i thought it might be my isp ( 3 in the uk ). so i booted into my xubuntu partition with kde 4 and networking works no problem. any help would be very gratefully appreciated. just ask if you need more info. thanks gareth