jesse Stratford's amfphp tut not working

[SeanPaul72]

I've followed the instructoions on Jesse Stratford's amf php tutorial but I keep getting an error when I test my flash movie, talk.fla.

The error I get is as follows:

status (object #2)
code 256
description "no class named talkback is known to the gateway"
details "/user/home/web/users/a0017855/html/flashservices/app/Executive.php"
level "User Error"
line 217

and the only output I get in my flash output window is

Calling returnString
Calling returnNumber
Calling returnArray

can any one help me out?

I really want to understand this remoting material.

Has anyone gotten Jesse's tutoriual to work?

Thanks