Monsters are Displaying "none" when attacked

[RoastBeef]

I am not sure if this is the correct location. This is the only thing on my server that I have found little, to no information on.

My problem:
As shown in the picture


Every time i attack a monster, the chat box says that the name of it is "None". Same as when a monster attacks me. Could it be that Its not finding their ID? If you need to know anything let me know and I will do my best to explain. I appreciate your help.
Thanks

[Bloodshed]

has been fixed, update server

[RoastBeef]

Thanks for you quick response bloodshed! How would I actually go about updating my server? And which files would i need? Sorry I am fairly new at this but If you can just redirect me to a better place for this that would be helpful. Thanks again!

[Bloodshed]

most people will use eclipse around here, try looking at some topics around the forum