lexmark s605 wireless not connecting to mac

Try restarting the router, then powering off and powering back on the printer once the router has established its connection.

If you're printer is still connected to your network, just try to re-add a network print queue under print & fax. Just follow the steps in this link: Add a Network Print Queue

But if you're printer got disconnected from your network, you can use the Lexmark Wireless Setup Assistant to reconnect your printer to your network and it will automatically create a network print queue under print & fax.

Please let me know how it goes.

Thanks!