flash - Security sandbox violation in Windows Server 2008 -

i experiencing security violation error when make http requests webserver.

error #2044: unhandled securityerror:. text=error #2170: security sandbox violation: 

i have following crossdomain file in root of server, , using same configuration in server host in machine. however, webserver unable connect windows server 2008 r2

this crossdomain.xml file:

<?xml version="1.0"?> <!doctype cross-domain-policy system "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd"> <cross-domain-policy>     <site-control permitted-cross-domain-policies="all"/>     <allow-access-from domain="*" to-ports="*"  secure="false"/>     <allow-http-request-headers-from domain="*" headers="*" secure="false" />  </cross-domain-policy> 

and .as file

security.loadpolicyfile("http://123.456.789.123:8000/crossdomain.xml"); security.allowdomain("*");  (...)  var enc:base64encoder = new base64encoder();     enc.encodebytes(mybytes); var base64str:string = enc.tostring();  var url_request:urlrequest = new urlrequest(); url_request.url = "http://123.456.789.123:8000/app/res/func"; url_request.contenttype = "text/plain"; url_request.method = urlrequestmethod.get;  var requestvars:urlvariables = new urlvariables(); requestvars.base64 = base64str; url_request.data = requestvars; url_request.requestheaders.push( new urlrequestheader('cache-control', 'no-cache'));  var loader:urlloader = new urlloader(); loader.dataformat = urlloaderdataformat.text;//binary; 

i have virtually tried every possible configuration of crossdomain properties nothign seems work. makes strange same configuration works server. there windows server 2008 specificity have overlooked? tips?

thanks.