internet explorer 9 - IE doesn't download clientaccesspolicy when run silverlight app from visual studio -

my silverlight application makes requests wcf-service on remote host uses ssl.

when run application visual studio (using f5) ie start page opens. make first request wcf-service communicationexception (related cross-domain policy). if refresh browser's page works ok.

looks ie can't download clientaccesspolicy.xml before refresh browser's page @ least 1 time.

but file on server , can download using same url.

fixed using iis + custom ssl certificate (instead of web development server). seems port used wcf , web app hosts silverlight app must same.