is this right? re:IGMP script

["Mike ." <dmciscobgp () hotmail com>]

i ran the IGMP discovery script against my local router which is sending out IGMP router membership packets (can see 
them w/ windump) am i supposed to see IGMP related info? because all i am getting is this output> (basically a fallback 
to a simple scan)
C:\>nmap --script broadcast-igmp-discovery -e eth0 192.168.0.1
Starting Nmap 6.45 ( http://nmap.org ) at 2014-04-16 21:15 Central Daylight Time
Nmap scan report for 192.168.0.1Host is up (0.020s latency).Not shown: 998 closed portsPORT     STATE SERVICE80/tcp   
open  http8080/tcp open  http-proxyMAC Address: 50:39:55:44:F5:AE (Cisco Spvtg)
even if i don't specify an IP , i get the same dump. turning on packet-trace gives me this:
NSOCK INFO [10.4070s] nsi_delete(): nsi_delete (IOD #1)NSE: N/A unknown protocol:0 > unknown protocol:0 | CLOSE
thanks /m|ke
                                          
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