Q: Can't connect to Internet using Airport Express & Cisco Linksys E2500

Is your goal with the AirPort Express to just stream iTunes or to extend the wireless range of the Cisco router? If it is to extend the range, will the connection between them be wired or wireless?

If the connection will be wired then both routers should be configured for a "roaming" network.

At this point, we may need to start from the beginning. I would suggest that you power-down the Express and start with just the Cisco router. With just this router running can you get both local network and Internet access for all of the network clients?

Ok, let's get the Internet back.

• Start by powering-down the Express, Linksys E2500, and the Internet modem.
• Power-up the modem; wait at least 10 minutes to allow the modem to stablize.
• Power-up the E2500; wait at least 5 minutes to allow it to stabilize. (Note: At this point do NOT power-up the Express.)
• Try accessing the Internet with your iPhone.

Please post back your results.

No, the E2500 is a wireless Internet router. You would still need a modem for Internet access.

Sorry, no it is a wireless router.