Receives empty response but can add users to moodle

In fact, that is what I was expecting (that is what I get too), so the connection seems to be working fine.

So... I am kind of lost here. I would re-check everything again (copy and paste the URL in case of typos, etc...) because I can't undertand that your test script works, and Joomdle does not, when it is using almost the exact same code.

i am also getting the same issue and i tried all the debugging steps explained above, everything seems to be fine.

when i tried the above link for my moodle site it gives me
"faultCode0faultStringAccess control exception"
Does it means that there is something wrong in my moodle configuration ??

I got my issue solved.

I was having running it on dev site which is not having a fully qualified domain name.
accessing it through ip address and also having a tilde(~) symbol in my url (that might have break the functionality somewhere).

After configuring the name name all issue got solved.

Thanks for sharing your solution.