how to make speech recognition

[Hymae]

I encountered several obstacles that have error messages when I combine the output of the component spectrum with bacpropagation training component.
Namely the error message:
[DCC Error] Unit1.pas (83): E2250 There is no overloaded version of 'Train' that can be Called with these arguments

This happens when I combine the component spectrum with a training component, where its form:
TILNeuralNetworkTrain.Train (ISLRealBuffer [], ISLRealBuffer []) method
Then I modified into:
TILNeuralNetworkTrain.Train (ALSpectrum1, AResposes)

To be able to understand each other, I described my first stage of what I have done. And if wrong I beg to be corrected,
- I use a computer with windows 7 operating system and using the program Delphi XE2.
- I am using component AudioIn, to pick up sound signals.
- Wav logger to store the sound file. Since I will detect the vowels (A, I, U, E, O) then I create a file in the form of wav sound training. Where for every vowel I use five training data spoken by 5 different people.
- Then to do the training network, I use wav player, to load, voice training files.
- After that I used a component spectrum for the signal extraction process.
My question, what causes an incompatible data is causing the error?
What is correct, step I have done to make the speech recognition system or there is a mistaken or wrong and what should I do?
thanks for your help