I can't send my serializable implementations through apache xml-rpc communication

Anyone know how to send my own serialized object implementations as parameter through a apache xml-rpc communication? I开发者_开发百科 already have the extensions enabled on both sides but every time i try to send an own serializable implementation an exception is fired up on client side with the message: "premature end of file". if I try send an empty array of that serializable implementation, the communication is successful done. it is something related with the content length?