Windows 7 RC & iMac

My wife and I are trying to ditch our old iMac and both use this Windows 7 machine. I've been transferring files over our wireless network from the iMac to the PC, using the iMac, with no problems. However, I decided that I wanted to try and get the files from the iMac while at the Windows 7 machine, but I can not for the life of me get the PC to find the iMac. I am not using a HomeGroup, any suggestions?

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.