ArcGIS for flex #2048 Security Sandbox conflict solution

Securityerror: Error #2048: Security Sandbox conflict:

The problem is: when the program is not released, it runs without errors. However, when the program is released, the access error occurs, prompting securityerror: Error #2048: Security Sandbox conflict: http: // localhost/xx.swf cannot load data from http: // localhost/ArcGIS/rest/services/mapserver. In the installation. net ArcGIS, there is a crossdomain under c: \ Inetpub \ wwwroot \ ArcGIS \ rest. XML: copy the file to the directory c: \ Inetpub \ wwwroot. The crossdomain. xml file contains the following content: <? 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 = "*"/> <Allow-http-request-headers-from domain = "*" headers = "*"/> </Cross-Domain-Policy>