Set up wireless network
I had a working network consisting of a cable modem (Virgin) attached by ethernet cable to an Airport Time Capsule with three Apple Express base stations to create a network. I exchanged the 1TB Time Capsule for a 3TB Time capsule and this is happily getting me on the internet. However, I now can't set up the original network. One base station is working wirelessly and the other two can be set up using ethernet but not wireless. The Airport Utility wizard gives me 'An unexpected error occurred. Try again'.
I am using an iMac 3.4 GHz Intel Core i5, OX 10.9.5 with a 3TB Airport Time Capsule and Apple Express A1264.
Can anyone help? Thanks
iMac (27-inch, Late 2013), OS X Mavericks (10.9.4)