Can't add a printer to network

Question

I have a desktop connected to the internet thru a wireless router (using a USB adapter). The Brother printer was working thru this connection till I secured the wireless network. It kicked out my wireless computer and the printer . I unsecured the network and was able to add my wireless computer but CANNOT get the printer to go back into the network. I spent this morning on the phone with Linksys and they told me I had to contact you to put the printer back into the network. HELP please. Patty