[j-nsp] multicast questions

[snort bsd]

Hi all:

I have an active multicast receiver looking for source 225.0.0.1:

-----------------------------------------------------
user at hs3# run show pim join extensive
Instance: PIM.master Family: INET

Group: 225.0.0.1
    Source: *
    RP: 10.100.3.4
    Flags: sparse,rptree,wildcard
    Upstream interface: so-0/1/0.0
    Upstream neighbor: 10.100.2.10
    Upstream state: Join to RP
    Downstream neighbors:
        Interface: fe-1/3/0.0
            172.20.30.1 State: Join Flags: SRW  Timeout: Infinity

                                        <-------- Nothing here.

Instance: PIM.master Family: INET6
------------------------------------------------

from above data, it doesn't seem to find the source. but I took a look at RPS:

-----------------------------------------------------------
user at RP# run show pim join extensive    
Instance: PIM.master Family: INET

Group: 225.0.0.1
    Source: *
    RP: 10.100.3.4
    Flags: sparse,rptree,wildcard
    Upstream interface: Local                 
    Upstream neighbor: Local
    Upstream state: Local RP
    Downstream neighbors:
        Interface: so-0/1/1.0             
            10.1000.2.9 State: Join Flags: SRW Timeout: 191

Group: 225.0.0.1
    Source: 10.100.5.200
    Flags: sparse,spt
    Upstream interface: fe-0/0/2.0            
    Upstream neighbor: 10.100.4.18
    Upstream state: Local RP, Join to Source
    Keepalive timeout: 32               <----- No downstream neighbor

Instance: PIM.master Family: INET6
-----------------------------------------------------

It seems that RP knows the source of group 225.0.0.1 but somehow the source and receiver just won't connect. Somehow RP doesn't work?

here is the RP config:

user at RR# show protocols pim
rp {
    bootstrap-priority 10;
    local {
        address 10.100.3.4;
    }
}
interface fe-0/0/0.0 {
    mode sparse;
}
interface fe-0/0/1.0 {
    mode sparse;
}
interface fe-0/0/2.0 {
    mode sparse;
}
interface fe-0/0/3.0 {
    mode sparse;
}
interface so-0/1/0.100 {
    mode sparse;
}
interface so-0/1/1.0 {
    mode sparse;
}


any ideas?