I mean, I have a tread. Someone is posting replay one then replay two and then replay three. When I look at the forum I see that message two must be deleted.
When I do that, message number one and three are also gone.
I don't want to delete them all only number two.
Is there a way to do that?

If you do not want to delete the replies underneath the posting you want to get rid of, a way around this is to use the "edit" feature and delete the contents of the posting, then replace the words that you have deleted with something like [Contents of Message Deleted].

Dave