When sendind data from flash to php, get URL error in Firefox


i´m sending some data to a php file, in order to save in DB. The data is being saved, but when I click in OK at the form button, I get the following error:

Error: Error #2101: A String passada para URLVariables.decode() deve ser uma string de consulta codificada em URL que contém pares de nome/valor.
at Error$/throwError()
at flash.net::URLVariables/decode()
at flash.net::URLVariables()
at flash.net::URLLoader/onComplete()

You can see the error at the site online: http://www.iconmedia.com.br/#/news and try sending the form using firefox. What could be wrong?