Flex/AMFPHP App NOT working in IE but works in FireFox...

Question

Hello I am beginning to develop Flex applications. I am
working with PHP in a Symfony environment.
The error below was appearing before in FireFox but
disappeared after I uninstalled the Flash Player plugin and
reinstalled the Flash debug player for FireFox. I also uninstalled
the IE Flash Player and replaced it with the Flash debug player for
IE (i believe it comes with Active X). I have the exact same
version of Flash player for both browsers, 0.0.47.0). This is the
error:
[object RemotingConnection]
Error #2044: Unhandled NetStatusEvent:. level=error,
code=NetConnection.Call.BadVersion
at sample/initApplication()
at sample/___Application1_creationComplete()
at
flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/set initialized()
at mx.managers::LayoutManager/::doPhasedInstantiation()
at Function/
http://adobe.com/AS3/2006/builtin::apply()
at mx.core::UIComponent/::callLaterDispatcher2()
at mx.core::UIComponent/::callLaterDispatcher()
Again this error was appearing in FF before but now ONLY on
IE. The same error arrises if I try to open the SWF file localed in
the bin/ directory in the Flex project. My flex project is located
on my Desktop and the server I am trying to connect to is on a
Linux box. AGAIN, this project displays the data perfectly on FF
but NOT on IE. It just displays several rows from a DB table in a
datagrid in Flex.
I have no idea how to approach this! Here is my ".mxml" file:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
xmlns="*" creationComplete="initApplication()">
<mx:DataGrid dataProvider="{phpData}">
<mx:columns>
<mx:DataGridColumn headerText="User ID"
dataField="userid"/>
<mx:DataGridColumn headerText="User Name"
dataField="username"/>
<mx:DataGridColumn headerText="Email Address"
dataField="emailaddress"/>
</mx:columns>
</mx:DataGrid>
<mx:Script>
<![CDATA[
[Bindable]
public var phpData:Array;
import flash.net.Responder;
public var gateway:RemotingConnection;
public function initApplication():void
gateway = new RemotingConnection("
http://project_dev_environment/web/backend_dev.php/gateway/amfphp");
gateway.call("Sample.getUsers", new Responder(onResult,
onFault));
public function onResult(result:Array):void
trace(phpData);
phpData = result;
public function onFault(fault:String):void
trace(fault);
]]>
</mx:Script>
</mx:Application>
Here is the required ".as" file:
package
import flash.net.NetConnection;
import flash.net.ObjectEncoding;
public class RemotingConnection extends NetConnection
public function RemotingConnection(sURL:String)
objectEncoding = ObjectEncoding.AMF0;
if (sURL) {
connect(sURL);
public function AppendToGatewayUrl(s:String):void
I have given a differnt URL because this is an internal
application and wont be accessible by outside users.
Again, this app works when loaded on FF but not IE! HELP
please I have been trying to figure this out since 7 am this
morning and I'm desperate!
Just FYI AMFPHP is set up correctly, although its version 1.2
- could this be causing problems?
Please, PLEASE help me! or at least a hint. Thank you!

Answer 1

Hey Tikis,
There are a few factors that could be throwing this thing
through a loop. I've had this exact same thing happen to me once
before and the culprit for me was that my crossdomain.xml file
wasn't 100% perfectly formed. Apparently Firefox didn't care enough
and went on with it's life however IE decided it wasn't going to
read it and I received that error, so that would be the first thing
I would check.
The next thing is what version of PHP are you running on the
server, it seems to me that the newest release of 5.2.2 is throwing
this error more often then ever before, something I might suggest
is upgrading to AMFPHP 1.9. RemoteObjects natively send data in
what's called the AMF3 format which is much speedier then it's
predecessor of AMF0. Only AMFPHP 1.9 has the ability to receive /
send the data back in AMF3 format, where as with the 1.2 version
it's sending the call, converts it down to AMF0 sends the data (at
a slower pace) and generates a result. The other advantage to being
able to use AMF3 is having true type casted results such as if PHP
returns a number you can check it by if(event.result == 0) where as
AMF0 everything is converted into a string and then sent back to
Flash / Flex. So aside from all of these advantages the last one is
less code, you no longer need to use the RemotingConnection to
convert everything down to AMF0. I would make a copy of amfphp on
your linux of the 1.9 version and send the remote object at that
first and see what happens, if you are still receiving the same
error then the problem lies in something else.
Hope this helps.