Flex 3 server.error.request sending webservice

I have a .net webservice that I call in flex and then I have a form where I insert a new post into a table via another method in the webservice. But when I try to insert a method, flex generates an error:

[RPC Fault faultString = "HTTP request error" faultCode = "Server.Error.Request" faultDetail = "Error: [IOErrorEvent type =" ioError "bubbles = false cancelable = false eventPhase = 2 text =" Error # 2032: Flow error ... URL: http: // localhost: xxxxx / xxxx / xxxx.asmx "]. URL: http: // localhost: xxxx / xxxx / xxxx.asmx "]

But the method works fine and the message is added to the database. This is a bit confusing because I really don't know what Flex does. What about having multiple methods in a .NET webservice, does it matter? Or try to call the same url with different webservice calls in flex.

Who knows?