I can't get my first Webhook to add to Audit Logs Table

Using the University site to learn as much as I can on QuickBase. I have been spending the last three days on Webhooks. I am having trouble. I am getting 404 errors. I have sent my endpoint URL sent to a troubleshooting URL and I do get a response. I am thinking that my message body is wrong, since I can't find any other reason I can't get the change of Tasks from 'not started' to 'in-progress' to write a single record?

<qdbapi>
<usertoken>%user.token.b5ejhe_nsv5_bsjd.Training Token%</usertoken>

<field fid ="6" > [Project - Name]</field>
<field fid ="13" > [Name]</field>
<field fid ="7" > [Old.Status]->[New.Status]</field>
<field fid ="8" > [Date Modified]</field>
<field fid ="9" > [Last Modified By]</field>

</qdbapi>

------------------------------
Bob Thomas
------------------------------