IQmath isqrt and div saturates at high numbers

hello, 

i am using iqmath v213 for c64+ DSP and would like to use one of the following functions _IQNisqrt and/or _IQNdiv

I need to use specifc Q format since I've wide dynamic range on my input data

I do get the following vectors:

short int nomVec[SIZE]

unsigned int denomVec[SIZE]

the IQmath shall provide me the abiliy to compute;

float outVector[SIZE] = nomVec/sqrt(denomVec)

the denomVec vector is 32 bits unsigned with dynamic range from 0-2^32-1

when attempting to use _IQ0isqrt (or _IQ0div) for large numbers (say 2^32-1e6) the output results is saturated (i do get 0)

Same results i get to other Qs such as _IQ1isqrt, _IQ2sqrt etc. The sqrt functions on the contrary do not saturate, but when applying div it saturates again

for smaller Qs i do get good results

Can someone help on this issue?

thanks in advance

ilan