Apple TV

Having trouble with APT seeing my wireless network. have tried the box direct to my macbook and it works fine.

However the Router is in the other room miles away from connecting direct.

When entering the normal wireless password atv won't recognise it.

Any help much appreciated

ok I've found that my router uses WPA Personal encryption do I need to change this up to WPA2 or WEP. If so how do I do this.