Remote iPad volume not playing - plays music on iMac instead

I loaded Remote for iPad to my iPad2 and it found my music library through home sharing no problem. However, when I hit play to listen to the music on my ipad the ipad volume is silent (it shows the music time advancing) but the music is playing full volume on my imac instead. WTH? Anyone else encounter this and know how to make a quick fix so I can listen to the music on ipad? I have successfully loaded home sharing to my mac air and listen to music on that computer no problem (without it playing on my imac).