Source Control integration with Perforce

[GrahamL]

Hi
I have an existing model stored in an eap file on which I would like to set up version control with Perforce.
So I went to Configure->Version Control->Project Configuration and set -
A unique ID
Type as SCC
Selected Local Project Path to point at the folder containing the eap file
But in the resulting dialog box no Source Code Control Providers are listed (Perforce is definitely installed - I use it daily)

What I am I doing incorrectly?

Thanks