Thank you for your response.
I'll try to answer the hints and see what next steps I should take:
* does the firewall allow SSH connections and does it work if you turn the firewall off?
Answer: Assuming you mean fire wall on Linksys Router. I followed the suggestions on the following website to configure the Linksys Router:
http://portforward.com/english/routers/port_forwarding/Linksys/WRT54G/
It shows the firewall off.
* check if you have the most recent version of PuTTY
Answer: Downloaded PuTTY from the following site:
http://www.chiark.greenend.org.uk/~sgtatham/putty/
* is it related to you're wireless and does it work if you connect the Mac with a network cable?
Answer: After making the changes to router and checking PuTTY version, I tried using a Windows box that is hard wired to the router as well as my laptop that is wireless. Neither seemed to work.
* if it works using cables, the look for posts in this forum about settings for Linksys routers to solve airport issues in OS X 10.4.10 and tried if the settings help you.
Answer: I should point out that my Mac is hard wired to the router and I'm not using airport.
Are there any other suggestions? I thought setting this up on Mac was going to be easy. So far, it seems to be tons easier on Linux. Evidently clicking the little System Preference Sharing radial button is not enough. That is disappointing.
Thank you again for any suggestions you can provide, as I appear to still be stuck.