kzn said:I presume you replaced the 'default' back cover with the one with a clip?
I think the pokewalker was designed to work perfectly with the default back case when it and the DS were flat on the ground, but the clip messes everything up and you have to hold the stuff at an angle.
Once you do it some it gets pretty easy to get the angle though.
Mine works just as fine with the clip on as it did without it on, so I don't think that's the problem. The clip doesn't cover the IR port in any way.