Before you mess around with complicated configuration does it work with a basic configuration? Not sure why your ISP cares about pinholes.
Does modem sync?
Do you have the correct VPC/VCI and username/pw?
Pinholes let you pass specific types of network traffic through the Netopia's NAT interfaces. Once configured, selected types of network traffic, such as FTP requests or HTTP (Web) connections, will be forwarded to a specific host or server behind your gateway device.