Cannot get data about all flights


I’m using PHP and NuSOAP, and through the function “FlightInfoEx”, I’m trying to get alla data, about a flight, but I cannot retrieve data about alla flights. Some flight code goes on, and some other return SOAP Error.
All selected flights used to try, are daily flights, and they are already arrived.
Sometimes all this one is ok, and some other time this isn’t ok. Why?
I take flight codes from the airport website.


Can you provide some examples of flights that do not work with FlightInfoEx? Have you verified that those flights are visible on our website?