Virus TI Snow MIDI in Standalone Mode

[MAX]

Hi, I'm new to Virus TI, so here's a question:
When I connect midi keyboard [midi out] to my snow in standalone mode [midi in] - there's no sound from the Virus.
I tried 2 different keyboards and midi cables, checked midi filters and channel settings (seems to be correct - 1st channel is set everywhere including the TI), still nothing happens...
I could get it sound via audition, so this is not an audio issue for sure.
Firmware version - 2.7.3, I haven't updated it and haven't used the VC yet.
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