Problem with posting and avatars vB 3.6.7

[Shaz8389]

Hello all, first post here, I am the owner of http://www.notoriouswrestling.com and am having a few small issues that although not major would probably help the forum if they were resolved.

Firstly, when a new thread is posted I get an error message that is as follows:

http://img112.imageshack.us/img112/5012/untitledmk1.jpg

But the thread is still posted.

I have tried replacing the files and have reinstalled vB twice now so I feel there may be more to it.

Also, when a new post is made, you get the message that there has been a duplicate and are taken back to the start of the thread as opposed to your post.

The final problem I have is that it isn't possible to use avatars at all for any members of the forum.

I look forward to responses and apologise if I posted this in the wrong section.

Edit: I find I need the following file: vba_cmps_plugin_newpost.php

Yeah that's where I'm stuck.