Philips router/modem giving line noise

I have just installed a Philips SNA6500 wireless router / modem, this purchase is mainly intended for when I pick up my Nintendo Wii next week, as before I had a wired connection, I also want my DS to connect through it. In the box I also got a USB receiver for the pc so currently im running the pc internet wirelessly also.
It seems to work fine, only now whenever the router is connected im getting line noise in my normal telephone, whereas I didnt get this with my wired router, does anyone know of any settings in the router configuration I could try to remedy this? The ADSL microfilter is situated in the same place as it was with my wired router.
Thanks for any help.