FDConnection Informix Timeout Values are ignored

Question

got here a FDConnection on the form .

FDConnection.Params.DriverID:=Infx;
FDConnection.Params.LoginTimeout:=15;
FDConnection.Params.ReadTimeout:=30;
FDConnection.Params.WriteTimeout:=30;

The above Timeout values are ignored , it takes much longer to show up an error.

For the FDQuery itself , which is also inside a try..except..end , it shows up immediately .

Any idea how to fix this?

Regards Robert