[Lynne]

Ah, I don't use table prefixes, thus my query did not contain the table prefix. You need to change user to vb_user for your site.

Do you have the hook newthread_post_complete in your form? If not, you either need to add it (find it in the vb code and paste it when something similar is happening in your form code) or you need to add the code you put in the plugin directly into your form code.