Forum:How to enable remote access for use with OpenVPN?

I've recently set up a personal VPN using OpenVPN, but I am having issues accessing my Screenplay Pro. When I connect the VPN whilst on my home network I can access the drive just fine, but when I am at a remote location I receive an error message that says I do not have permission to access the drive.

Basically, I believe it does not have remote access enabled, and I cannot find anything that explains how I can do this. Can anyone help?