I have an IBook and a PC connected to a wireless Verizon router. I have a printer hard wired to the PC. My IBook does not recognize the PC and the IBook doesn't recognize the PC wirelessly but when the IBook is hardwired to the PC I can print from the IBook to the PC printer. How can I make it work wirelessly

I used to have a similar problem which disappeared when I got an Apple Extreme wireless router. Don't ask me why.