Bridge time out

Hello all,Yesterday I installed DD-WRT on my Linksys WRT160N just so I could use it as a wireless bridge. I'm using WPA2 (AES) encription and have it connected to a RICOH Aficio 2018 Printer.Everything works as it should... I can print to it from 3 laptops, and the scanning function emails the correct recipients, so I'm confident all the settings are correct. The problem, which I hope is just a setting I have missed and that someone on this forum can assist wit, is that after about an hour (a guess..I haven't timed it) of inactivity, the WRT160 goes to sleep, and I cannot print (or ping it) If I power cycle it, the print jobs all print, but I don't want to have to power cycle the thing every time it's been idle for a while.Can anyone please assist this absolute newby...I'd never even heard of DD-WRT until 9pm last night.?Ian