Wierd Linksys, dhcp and slow network problem

Hello,

The basic setup:-I have a WRT54GS Linksys wireless router, one PC,

which is always on, is networked directly to the router via ethernet

cable, and two PC's using linksys wireless adapters. One of these PC's

is new and I have just set it up.

My Problem:- When my new PC (wireless) is turned on, the network on it

alone, is very slow UNLESS i turn on the laptop as well (also

wireless). When that happens, the network traffic on the new PC works

absolutely fine. So basically at the minute, in order to stream movies

and copy files over on to the new wireless PC i *have* to have the

laptop on as well!

I figure this is something to do with the routing table as essentially

the new PC has trouble when it is assigned the last IP address and

there are no other computers with later IP addresses on. When laptop

is turned on, the new PC is then no longer the last computer on the

routign table and so works fine. I'm not sure if this helps with

diagnosis as it all seems a bit odd to me but then i'm not so hot on

networking issues etc. There is no doubt at all that my new PC's

network works fine only when my laptop is also turned on. I am hoping

that someone reading this will know what the trouble is and can help!

I have considered turning off DHCP ad going to static IP addresses,

but it's a bit of messing about so thought i'd post here before trying

that as a possible solution.

Thanks

Mel