Accessing another computer on wireless network

I have to PCs:

PC1: Win 2000 with Netgear WG121 wireless adapter
PC2: Win 98SE with Netgear WG121 wireless adapter

They both connect to a Netgear DG834G router/modem to share a DSL internet
connection.

I want each computer to have full access to the other's hard disc - ie a
simple LAN. Security is not an issue, in fact I would prefer to have none.

On PC1 I cannot even see PC2 when I open the networks link. On PC2 I can see
PC1 but am not allowed to access anything.

I tried following the W2000 network troubleshooter on PC1. I was able to
ping PC2 so the basic connection is there.

Can anyone advise what I need to do.

Thanks

John L