WMP Streaming To Another WMP?

I'm having a bit trouble setting up streaming and remote controlling from my WMP in laptop (name LAP1) to another laptop running Windows 7 & WMP (name LAP2). Here's what I've done so far...

I have set up a homegroup. Put ticks on all libraries (music, photos, etc.). Turned on Music Streaming. And in further settings of music streaming Ive turned on Allow All. This I've done on both laptops.

In WMP I've turned on "Allow remote control" and "Automatically allow devices to play my media" on both laptops.

I can see both the WMP devices in Network. They both connect to each other ok as well. Now from LAP1 I try to play a music file (right-click; Play To; LAP2). A new window pops up. This shows that the file is trying to be played on LAP2. This window keeps showing a 'waiting sign' (revolving circle), and the WMP on LAP2 shows a message at the left bottom that "media changing...". And that's it.. nothing happens further.

But if I directly play a media from LAP2, that popup window on LAP1 allows me to move the slider position, play/stop, set volume, etc. That remote control feature is working ok. But when I play media from LAP1 to LAP2, it keeps showing a waiting sign and nothing happens.