Fastrack resets under heavy load?

Hi, all

It is a long shot, but did anyone had any exerience with Fastrack resetting under heavy processing load?
Our application is quite computationally intense. I now have two units that will reset when we do heavy processing (basically signal processing stuff) and GSM call is active.
Unit in question is Fastrack Supreme. FSU004

Same code will run OK on FXT001 and on other FSU004 we have on same external power supply. My gut feel is that internal power circuitry in the Fastrack fails.
What is most annoying – there is absolutely no debug information associated with crash. EEPROM is clear and no messages come in TMT.

Just wondering if anyone else saw similar behaviour on those units?

Rudolf Ladyzhenskii