Cisco WAN :: 4948 / 6509 / 2960 - How To Implement Multicast On Network

We want to implement multicast on our network. We are going to use for  online teaching purpose. I am very new at Multicast and not have much  idea about it. We are not running any routing protocol in our network,  only static route. The multicast server is located at One of our office  and it is connected with L2 (Cisco 2960) switch, L2 switch is connected  to L3 switch(Cisco 4948). L3(Cisco 4948) and Core Switch(Cisco 6509)  with FWSM are connected with E-3 link with tunnel. Router 1 and Router 2  are connected with P2P ILL links which are terminated at serial  interface. The Multicast Server IP is 192.168.2.131/25. The scenario of  our network are mentioned below:
 
Multicast  Server--->(L2 Switch)--->(L3 Switch)--->(Core  Switch)--->(FWSM)--->(Router 1)---->(Router 2)--->(L2  Switch)--->(Multicast Client)
 
 We  have created a seprate vlan (i.e. vlan 102,   interface IP is 192.168.2.129/25) for multicast at L3 switch, enable  multicast routing, defined rp-address(i.e. 192.168.2.129/25), enable  sparse-dense mode at multicast vlan as well as at some other vlan also  for testing purpose and joined multicast group (i.e. Multicast IP is  224.3.3.5). At core switch we have also enabled multicast routing,  defined rp-address (i.e. 19.268.2.129/25), enable sparse-dense mode at  user vlan and inside vlan of FWSM and joined multicast group at user  vlan and inside vlan. At FWSM we have enabled multicast routing, defined  rp-address(192.168.2.129), doesn’t find any option to enable  sparse-dense mode and joined Multicast group at inside vlan and router 1  vlan. At Router 1, we have configured the same thing. We have  configured mroute at all the devices. We are able to ping from end to  end. We are testing multicast by Multicast IP checker tool (provided by  vendor). Multicast is working fine at L2 switch, L3 switch and Core  Switch, but not from Router 1. Ping is reachable from Router 1. After  doing mtrace at Router 1, the following output has come:
 
Router 1 (Mtrace with destination address 192.168.2.131)
mtrace 172.21.15.2 192.168.2.131 224.3.3.5
 
Type escape sequence to abort.
Mtrace from 172.21.254.50 to 192.168.2.131 via group 224.3.3.5
From source (?) to destination (?)
[Code] .....
 
If , we do mtrace from gateway IP address(i.e. 192.168.2.129) as  destination address then mtrace is getting completed, but if mtrace is  done from Mutlicast server IP address(192.168.2.131) as destination  address, then mtrace is not getting completed.
 
  We  have connected one laptop at Router 1 vlan to test Multicast. The host,  which is connected to Router 1 vlan is able to send multicast packet to  other host and other host at different vlan are receiving it , but it’s  unable to receive multicast packet send by other host of different vlan.
 
Do I need to enable igmp snooping at L2 switch, L3 switch and Core Switch ? I am not able to understand or can't figure out where i have configured wrong.