SWX

I am inserting some data into nodes via a Flash application using SWX PHP (It's very like AMFPHP). All works well apart from the CCK fields. I'm having a massive problem trying to insert more than one character (the first character) into any CCK textfield. I believe this is because I haven't got the right formatting in my Flash AS2 code, but feel like I've tried every combination of Objects and Arrays to get it to work... to no avail :(

What should the format be? All the other normal node fields insert fine...