nmap ssl-heartbleed Script

[Rogueit]

So I downloaded the ssl-heartbleed script for nmap 6.4 and also put the tls.lua in the appropriate directory. However when I scan a server that qualsys tells me is vulnerable to heartbleed I only get the following

nmap -p 443 --script=ssl-heartbleed Server1

Starting Nmap 6.40 ( http://nmap.org ) at 2014-04-24 16:33 Eastern Daylight Time

Nmap scan report for Server1 (192.168.1.130)

Host is up (0.037s latency).

rDNS record for 192.168.1.130: Server1

PORT STATE SERVICE

443/tcp open https

I can see where it tells me port 443 is open but how does this tell me it is vulnerable?