Network problems

[NEENAHBOY]

I'm currently running a PowerBook G4 on a Linksys wireless network with three Windows machines, two of which are hard-wired to the router. Lately (actually since 10.3.6), whenever I put it to sleep for extended periods of time (2-3 hours), upon waking up it does not recognize the Linksys network settings. Putting it back to sleep and waking it back up after ten seconds usually solves the problem, but sometimes it gets very cranky and I am forced to input the WEP settings again. The real kicker here is that the screen will not accept the actual password, but rather the password in scrambled letter and numerical digits. So, in essence, I have to input twenty-five digits to get it to recognize the network again. There has to be a way to fix both the PowerBook problem and the Linksys difficulties. Thoughts or suggestions???