Port opened for utorrent but not for other clients

[pavicjosip777]

Hello,
I have strange problem with port forward. The port works fine with uTorrent but it doesn't
with other client like qbittorrent, tixati, deluge. Why? When I test utorrent on canyouseeme.org I pass the test but when I test the same port only with other client I get  connection timed out. windows firewall is disabled
http://i62.tinypic.com/2dvq5gn.jpg
http://i57.tinypic.com/2ut5dnk.png

[sledgehammer_999]

I suppose you have closed utorrent when opening qbt write?
Does the round icon at the bottom(statusbar) of the qbt window become after a download has started(give it a few seconds)?

[pavicjosip777]

I closed uttorent. The icon stays yellow

[ciaobaby]

Only one application can listen on any one port at any one time, and your router should not allow two separate instances of the same port forward for one protocol.

[bloodybunny]

Use different port/application  ex: utorent 57520 qbit 57521

[pavicjosip777]

Tried defferent port but it doen't work

[pavicjosip777]

I solved the problem. The trigger port field in my router settings must be empty. Can someone explain me why?

[ciaobaby]

What does a 'trigger' normally do.

hint.
Think along the lines of how a gun works.