Not sure about how to reply to a private message

[TOMGREEN413]

Hi guys,
Apologies for being extremely un techy but I've received a private message, I've managed to write a reply and send it but I'm still showing a message waiting to be sent in my Outbox......I'm confused....please can someone help

 

[pvr]

It remains there until the recipient opens it

 

[TOMGREEN413]

That's great to know, thank you for such a prompt response