Problem with comparing negative numbers?

Hi,

I created trigger which checks if the value of field is less or 
greater then -5, and accordingly print message.

Problem is in results: I get that -1 < -5 and -6 > -5, and -10 < -5 and 0 > -5.

This is trigger:

<trigger type="POST-FOCUSOUT" name="Trigger3">##
## entTe.Pre-FocusOut (Entry-Level Trigger)
##
unos = blkBlock1.fldTe



if unos&lt;-5: blkBlock1.UnboundField2.set('less then -5')
else:blkK_d.UnboundField2.set('greater then -5')
return

</trigger>

Is anybody know where is mistake?