Httpservice to localhost doesn't work in Flex4... Even with crossdomain.xml

Question

So, this was working before I recompiled with Flex4, (In Flex 3.5) and now I can't get the following to work....
Story:
I'm using httpservice in flex like:
<mx:HTTPService id="getConfig" url="http://localhost/parser.php" method="POST" showBusyCursor="true" resultFormat="e4x" result="xmlresultHandler(event)" fault="faultHandler(event)" />
Everything is in my root directory on my web server. When run in debug or directly from flashbuilder, the call works fine. If I run a release build, and FTP the release to /var/www (my root), and try to browse to the server, the website pulls up, and the swf file runs, but I always get a
Fault:Channel.Security.Error
FaultString:'Security error accessing url'
faultDetail:'Destination:DefaultHTTP'
when it trys to read the httpservice.
I do have a crossdomain.xml file in my /var/www (webroot) folder with what I see as super permissive settings.... Below:
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<allow-access-from domain="*" to-ports="*" />
<site-control permitted-cross-domain-policies="all" />
<allow-http-request-headers-from domain="*" headers="*" />
</cross-domain-policy>
Any help would be GREATLY appreciated.

Answer 1

Thanks for the info Flex harUI,
So I tried bringing up the 3 files (crossdomain.xml, main.swf, and parser.php) from a browser and they call exist and are reachable.
So I get the localhost vs. absolute address this. That makes sense. So I recoded the httpservice call to url="http://10.101.50.60/parser.php". Which is the actual fully qualified address in this case (There is no DNS server), and what I'm pulling up in the browser is "http://10.101.50.60/index.html". So after making this change, I can still access and have everything working in Flash builder, but again, when I standalone compile and upload the main.swf to the var/www directory and pull it up in the browser via http://10.101.50.60/main.swf. I get "Security error accessing URL". So basiclly, same thing.
Spent two days on it now.....