shared printers

My clents suddenly lost access to netwrok printers. I connected the printers to client computers and they worked but only from that computer. Then I reconfigured the whole lab and connected the printers back to the server. Now the server prints (theprinter is connected to the server)but the clients still won’t print. I want to make sure I have print sharing on. The problem could be a88 security block either on this server or the main server of the network.