HP Wireless Printer Network Issues

[Tiburon1186]

My wireless printer keeps disconnecting from my protected network running out of a Linksys WRT310N router. I believe the issue is that the HP printer does not store the WPA2 passcode and that the router has a limited lease time on a single connection where a device must reconnect using the passcode again. How can I make it so that the lease is infinite or so that the printer can stay connected? Thanks.