File sharing over a win 98/xp network

This should be a simple problem for the networking experts but just to let you know i am a newbie in networking. Anyways, here is the problem
I have two computers, one has win 98 and the other has xp. I want to share files among them. I did set up the xp computer and win 98 computer to form a network. However, I am not able to access files or even see the other computer in the network. I mean that in XP, when I go to my network places and all the way to Mshome (name of network) I can only see one computer and same with the other 98 computer. So, please tell me what should I do to resolve the problem. Keep in mind that I may be a newbie but not that new that you start telling me to take win xp cd and go to perform other options and then create a home or small office network etc because I already did that and that is how I am able to see the 98 computer in itself network neighbourhood. I am online so I will try each solution as soon as I receive it and post a reply and I want to wrap up this questing as quickly as it is resolved.