How to solve networking problem -- one wireless and one wired pc to talk to each other on a network?

One laptop pc running xp is connected wirelessly to Verizon router and one desktop pc running xp connected via cable to Verizon router. The desktop machine has no wireless capability. I have run the Windows network setup wizard taking a flash drive between the 2 machines during the setup process and the 2 machines see each other but cannot access each other. Any suggestions?