coldfusion flash integration: 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?