MidiSysex doesn't work

Hello everyone!
I can’t recive data via MidiSysex from a midi keybord. There is just an empty string in output pin.

When I try to recive data via MidiShort its work without problems.

What could be the problem?

https://vvvv.org/sites/default/files/imagecache/large/images/2015-01-19%2020-53-44%20Скриншот%20экрана.png