Streaming multiple streams from multiple capture cards at the same time

Hi All,

I have 2 the same capture card. And I am trying to stream to 2 diffrent rtmp server. I start first one and no problem. But when I run second FME instance and select second stream card, first one turns to black and second one shows up. When I close second, first one again comes back.

What shoul I do for streaming multiple streams form multiple stream cards?

Best regards.