When I attempt to send a new message to another member, I get the following error:

A critical error has occurred.
Index was outside the bounds of the array.

However, I am able to reply to an existing message without any problems. Thank you for your help,

Lee

Sounds like the autocomplete isn't loading. Does the users name have the blue wrap around it?

no it does not. I have autocomplete turned on but you are correct that it is not working.

I am using AS 1.5.3, AF 4.2.5, & fatgeorge UsersOnline 1.1.0.
What other information do you need to troubleshoot? Thanks,

Take a look at this post...
http://www.activemodules.com/Commun...fault.aspx

Thank you Will,
Just for the other viewers of this thread, my issue was using the lightbox of Ultra Video Gallery. As soon as I turned that off, messaging worked fine again.