Sending pings

Hi there for all of you.
My issue, for wich im asking some help, is:
Ihave wp 2.9.2 installed, i have pingbascks and trackbacks enabled, i have the xml-rpc protocol enabled, and also the curl library enabled on the host. But !
I receive pings and trackbacks.I can send trackbacks BUT I CANNOT SEND PINGS.
I’ve been trying to send ping to a couple of other sites and nothing.It doesnt appear nothing also in the db at the “pinged” or “to ping” table.
And one more thing : When i run a manual pingback using https://www.solitude.dk/ping/client.php i get the next error:
Error. The server said: The source URL does not contain a link to the target URL, and so cannot be used as a source. (17)
Though the link is present in my post.Checked and double checked.
Here is my test post.

Any advice would be more than appreciate, cause i dont’t know what is the issue

Last edit :
Also testing a post with https://redalt.com/ping givs the following error :
Error.
Fault code: 0 : The source URL and the target URL cannot both point to the same resource.
Yet againg the links can’t be the same.

But the wierdly thing is that if i ping a page with Redalt the message is “Succesfully pinged”