Help connecting PC to TC, airport

[SMcGill]

I just got a new imac & time capsule yesterday, and I wanted to keep my pc in the network. So, I got a Linkysys Model No. WMP300N wireless-N PCI adapter. I set everything up, my imac is connected to TC with ethernet cable, my Nintendo wii can access the wireless network, so I know that it is working. My problem is that the PC can't find the network. To eliminate a variable, I moved the pc next to the TC and it still couldn't find the network. I'm sure there is just something that I need to reconfigure in the settings. If anyone can help I would greatly appreciate it, thanks.