Airport Express problems joining Linksys network

I recently tried to extend my Linksys wireless network using an Airport Express. Every time I’d select my wireless network and set the password (it automatically filled it most of the time) it just wouldn’t work. 

After further investigation, I found that the WEP encryption level on my Linksys router was 64-bit and the options on the Airport Express were 128-bit, 40-bit and Transitional WEP Settings.

The solution was to use the 40-bit encryption option, even though my Linksys router’s encryption was set to 64-bit. Works like a charm now. Booya.