[theducks]

Originally Posted by patray

My laptop and Nexus 7 are both in my home in Cyprus. I have already had Calibre on my laptop for some time and it was downloaded in the UK. I find it very useful.

I came across CC while browsing on the Nexus in Cyprus. I have been using drop box to transfer books so thought I would give CC a try and downloaded while here in Cyprus. I wanted to know if downloading in 2 different countries was causing my problem.

Assuming I can follow theducks and manage to do what he says does that mean that I will have to do that whenever I leave a country and use a different internet provider?
Regards, Pat

You don't need to do any of post 3 to get co-located devices paired.
(you still might want to later, but not needed for THIS problem)
You did 'Start' the wireless connection in Calibre (Sharing Icon) after you set it up [If using that mode in CC]

or

You did 'Start' the 'Content Server' in Calibre (Sharing Icon) after you set it up [If using that mode in CC] <- you can test this with any browser using the same IPort as you set in CC (default is IP:8080)

Both of these have OPTION settings to Automatically start with Calibre. Otherwise you need to do it every time you want to use CC after a Calibre start.

I suspect your Laptop firewall is blocking those ports. Or you have a conflict (some other 'service' is running on the laptop that uses the chosen port)
The last is you have 2 routers (using a different one for WiFi) and your network is logically split.