Problems with polyphony and latency

[Storm Music]

I'm feeling quite some latency on my TI2 polar, when I - for instance -play 4 tones with a trancy hook sound with voices set to 4.
You know, it's just a little, but definitely some - and too much...
And if I want to stack different sounds for really fat leads in multi-mode, it's really bad...
The feeling is... like I'm unable to play all the tones at exactly the same time, but as a trained pianist I know I'm playing it at exactly the same time...

I thought the TI2 was supposed to have lots of DSP power...

Anyone knows if this can be fixed or anything?

BTW - we're talking stand-alone mode... No USB, only audio cables to my mixer (rehearsing for a spring tour starting in one week, so I have to get the problems solved pretty soon)...