OK, omitting the directory '/carp/' in the address bar (otherwise I get an error), I now get this in carpsetup:
Checking your server's PHP function support...
Warning: fsockopen() [function.fsockopen]: unable to connect to 10.216.12.148:80 (Connection refused) in /home/fhlinux148/c/mydomain.co.uk/user/htdocs/carp/carpsetupinc.php on line 98
Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/fhlinux148/c/mydomain.co.uk/user/htdocs/carp/carpsetupinc.php on line 99
Warning: fsockopen() [function.fsockopen]: unable to connect to test.geckotribe.com:80 (Unknown error) in /home/fhlinux148/c/mydomain.co.uk/user/htdocs/carp/carpsetupinc.php on line 99
IMPORTANT: The test of the "fsockopen" function, which CaRP uses to access feeds, failed. If a warning message appears above, it describes the nature of the problem. Otherwise, your server or host firewall configuration is blocking it. Under either of the following conditions, you may still be able to use CaRP on this server (scroll down to the bottom of the page to continue):
You only need to display feeds that are hosted in static files (ie. not generated on the fly by scripts) on your server.
This server is configured to refuse TCP/IP connections from itself and either:
is not currently connected to the internet, or
is blocked by a firewall from opening connections to other websites (in which case, you'll need to get your web host to open the firewall for CaRP before you'll be able to access remote feeds).
If neither of those is the case, CaRP will not work on this server.