Airport will not connect to my preferred wireless network

Question

Hi,
I set up a wireless network in my house. My mac connected has connected to it before, but when i had to restart my computer I can no longer connect to it again.
I have added it under my preferred networks and it is top of the priority list.
Every time i try to reconnect it, my comp tells me "connection timedout", therefore not letting me reconnect to it. My router etc appears to be working properly as i can connect via ethernet.
I have tried deleting the preferred network and re-adding it, and rebooting my computer. Nothing seems to be working.
Someone who know about computers please help i have work that needs to be done!
Thanks!

Answer 1

Thanks, but it didn't work.
My mac remembers it, but doesn't remember the settings (ie on the preferred list). It tells me that none of my preferred networks are available, even though my network is still in the preferred list.
So i click on my network when it tells me that none of them are available and re-enter my password and it always says connection timeout.
It was working perfectly earlier on today, like i said when i restarted my computer, it automatically connected to another network and i haven't been able to get on to mine since!