Message Posting Interface Problem

[Calricdal]

I've recently install vBulletin 3.70 on our soon to be new forum.

The problem I'm having is the message posting interface is not working properly.

I'm not able to edit the fonts, insert images or smilies.

When I go to enter test post, I get the following message:

The message you have entered is too short. Please lengthen your message to at least 1 characters.

The post I am entering reads: This is a test post to see if the system is working. Clearly this is more than 1 character in length.

All the other parts of the forum seem to be working fine so far. I can upload avatars, profile pics, enter info in the User CP and so on.

But, I cant post a thread, or edit a signature, or anything else that requires the posting interface. I'm sure it's something simple and intuitive that I need to be doing. Thanks for your help in advance.