Error Compiling flash forms

["Hughesh" <webforumsuser@xxxxxxxxxxxxxx>]

Hi,

 I'm currently experiencing a problem when compiling flash forms:

  
 Error /Copyoftest2.cfm:-1
 macromedia.css.LocatorParser


 Error /Copyoftest.mxml:376
 The class 'mx.rpc.RemoteClassRelayResponder' could not be loaded.

 I've searched for a resolution but had no joy,  The code is simple and as 
follows:

 <cfform format="flash" width="500">
 <cfinput type="button" value="Hello" name="hi" />
 </cfform>

 Can anyone shed any light on this?