Problems sharing internet

[Blitz]

I have a macbook, and I have been trying to enable internet sharing VIA airport, but it's not working. I set it up like all the sites tell me to, but it doesn't work. I'm not getting the up arrow on Airport, and I'm not seeing the signal on my ipod touch or my roommates computer.

Solutions?

Thanks

 

[Blitz]

Really? No one?

 

[harisdmac]

Can u describe in details the steps you make?
Are you sure that your airport is working properly? (can it connect to wireless networks?)
And what exactly is the issue, you get no signal at all or no connectivity?