Is secure to use SqlWhereItems on OnPrepareSQL in IBODataset derived comp?

I am trying without success make a refresh with TIBOQuery with:
TIBOQuery.InvalidateSQL;
TIBOQuery.Refresh;
After this the TBGrid bound to dataset doesn't reflect the Refresh and gives
AV when trying scroll it.

Does it was done to work with IBODataset staff?

I know that with IBO native datasets works very well.

Thanks in advance,

Luiz.