Can you explain what you are trying to do exactly? What connection, and through which screen?
The format for each name should include a hyphen, such as:
I hope so, Melanie.
If I had to take a guess, you might be doing what I did way back when. I was taking "www.wikitree.com" and adding "Persinger-455" to it and BAM - it failed. However, if you do a "www.wikitree.com/wiki" and then add "Persinger-455" to it - TADA! It works!
https://www.wikitree.com/wiki/Persinger-455
https://www.wikitree.com/wiki/Persinger-452
Or you can click the links and it works that way too. Let me know if maybe I guessed correctly, because I did that too at one time.