The router uses 64-bit (=40-bit) encryption. The Airport Express automatic setup assumes 128-bit and will generate a garbage password that won't work. You need to click "Manual Setup", then choose Wireless, and then the Wireless Security pulldown will include the 40-bit choice.
The router uses 64-bit (=40-bit) encryption. The Airport Express automatic setup assumes 128-bit and will generate a garbage password that won't work. You need to click "Manual Setup", then choose Wireless, and then the Wireless Security pulldown will include the 40-bit choice.