I have Installed and activated the isoft plugin and set the API key and URL.
When I go in amember to aMemberCP -> Manage Products -> Edit,
I see a dropdown menu next to Infusionsoft access.
However, there is nothing to select. It just gives the option **No access.

I already set InfusionSoft access(tags/group), but I still not see it.
I re-check the API URL & API KEY if it's correct.
I also check aMember & InfusionSoft cron if it work when I type it straight into a browser window, and its ok.

I think my aMember had problems connecting to Infusion.
In the aMember CP -> Error/Debug Log I got the following error message:

XMLRPC Error - -32300 : transport error - could not open socket

What could be the problem? Please help.

My problem is now fix.

The problem occurs because SSL is not enable in Registered Stream Socket Transports.

To fix this: Contact Hosting Support or if you have access to the cpanel, you need to set/allows SSL connections for fsockopen() PHP function.

Hope this help other people who have the same problem.