how to find my airport express on my new network?
I have updated my Comcast modem/router, which supposedly has higher speeds. I connect an Airport Extreme base station via ethernet cable to the Comcast. I am able to link that through the "create a new wireless network" function. I am unable to see either of the airport express stations that I have in the house to extend my new network. I get glimpses of them, but they keep disappearing. How do I find them and link them to the network. I should be this difficult Apple!!!
MacBook Air (13-inch Mid 2013), OS X Mountain Lion (10.8.4)