Help with URL

I can paste the following URL in the address bar:

http://www.trip.com/trs/cheaptickets/galileo_flight_tracker/galileo_home.xsl?ft-airline-code=DAL&ft-flight-number=55&cmd=ftg-find-flight-text

but after the page loads, the URL address changes to:

http://www.trip.com/trs/cheaptickets/galileo_flight_tracker/text_results.xsl

now the page cannot be refreshed without having to repaste the original address.

My question is how can I stop the URL from changing?

That depends on what is causing that behavior to begin with.
Is that your site?
If so, what exactly is going on behind the scenes there?
If it is not your site, they probably don't want people deep linking like that.