Connecting PC to Mac via Ethernet problem

Hi, I really need to transfer a lot of data to my mac and so wanted to network them. I tested it a few days ago and it worked fine...now today when I actually need to transfer, it doesn't connect, it just says connecting for ages then says it cannot connect.

I have tried with 2 different PCs both running windows 7, countless shared folders with different settings and with 2 different ethernet cables. I have no idea what I can do to try and resolve this and I really need it to work.

I am running Mac OSX 10.5 with 2gb Intel Mac, connecting to Windows 7 Pro PC.

The windows machines connect to each other no problem, I have triple checked the ip addess using ipconfig and I have tried every sharing option possible. This worked perfectly a few days ago and the mac was **** down and left alone until today...It's driving me insane!


Can anyone please help?

 

Sorry, I don't know what you mean by that