AS3 AIR question

Hi

I have a desktop AIR app that sends vars to a php page, which then rewrites a new css style file.  After the vars are uploaded, I set off a refresh function in AIR that refreshes an html display pane, so you can see the css style changes on the html page.

I was working great, but since I have changed hosts, I find I have to send the vars twice to see changes. 

I thought maybe the problem was that AIR was displaying the new page before php had a chance to write the new css file, but even after putting a 2 second delay timer on the refresh, the problem still exists.

I have also made the refresh function  URL request append date and time as in:

varSend2 = new URLRequest("http://www.blah.com/"?time=" + new Date().getTime());

Is there a trick to force the html display in AIR to display the new CSS settings first time around?

Thanks guys.

Shaun