I have been having issues with my home network. Sometimes I have to re boot my router in order for computers or ps3 to see each other on the network.

I have 2 computers, both use a wireless connection.
A PS3, and a Nintendo Wii.

Both computers are running XP
Router is a Linksys WAG325N

I have been using a trial version of network magic, And uninstalling/Reinstalling to get everything working. I really need to buy a licence and use it properly!

I did give try networking through the windows wizard, But I didn't have much luck.
Everything always connects to the internet, but If I want to stream music from the computer to the ps3, then more often than not the ps3 can not find the media server. Or the two computers can not see each other.

What can I try to fix this problem, Any help would be much appreciated