IGMP Membership Query Message Question

[Videoman]

Hi

I setup an local mulitcast service using VLC media player as server and only one Ethernet Switch with IGMP-snooping enabled as a gateway for other VLC clients in windowXP .

1) Once any VLC client starts to play, VLC ask WindowXP to issue an IGMP Membership Report message to the Ethernet Switch. And then, the Ethernet Switch multicast the traffic to that client only.
2) If the client stops the multicast traffic, VLC ask WindowXP to issue an IGMP Membership Leave Message to the Ethernet Switch to stop the Multicast traffic.

The question is

3) If the client wants to play the video for long time, the Ethernet Switch sends an IGMP Membership Query Message to the VLC media player which play as a video server. The VLC media player does not ask WindowXP to reply an IGMP Membership Report message to the Ethernet Switch. As a result, the timer for the IGMP snooping is timeout in the Ethernet Switch and the Ethernet Switch starts to multicast the traffic to all client.

My question is

1) Does VLC ask WindowXP to reply IGMP Membership Report Message once it receives IGMP Membership Query Message.
2) Or it is WindowXP issue but not VLC media player?