The Denon AVC template is spefically designed for units which are controlled by RS232. This is because it has to send specific commands which are VERY different from what happens over IR.
You can not use this device template with an IR denon receiver.
Now, I WOULD recommend replacing your Denon receiver with a model that has RS232 (as these are very prevalent and inexpensive, i.e. 2308/2309/2310/2311 Denon has a habit of using the last two digits as a year number for the model.)
Barring that; What you would have to do, because we do not have an IR template for Denon receivers, is create a new IR based template for your device in the web admin, by going to Wizard > AV Devices > New device, and then click Add Device Template, and following the instructions there to select the capabilities of your receiver, what commands it can receive, and to use your USB UIRT to learn the codes from your existing receiver's remote.