Sounds like you have a reasonably protected connection arthurking. The best test is to go to another connection point on the net (at a friend's house for example) and run a scan from there. I don't put much faith in these scans performed from free commercial sites.

The only thing that you need to check is that you have the correct IP address. You want to check this on the WAN side of your router before you run the scan. Unless you pay for a static IP address from your ISP - your WAN address can/will change.

Just a note on the PAT and NAT comment from gunit0072003.
PAT is Port Address Translation
NAT is Network Address Translation

Both of these can happen in either direction, and can change several times as an IP packet travels between source and destination.

NAT is generally used to either "Hide" internal addresses from an external source, or to allow a private IP address range to communicate over the Internet (private IP address are generally not routable over the Internet.) So a business may use several private ranges within their internal network but only need to pay for one public IP number when connecting to the Internet. NAT swaps the addresses as the IP packet leaves the business network via a router or firewall.

PAT is used generally by proxies to keep track of outbound connections to the WWW.
The process can be differcult to explain - but if you are interested a guick google for proxies and PAT should find some good info.

Golam