[java-dev] FileNotFoundException

Hi, I'm new to max. I'm trying to make a mxj object to read a txt file, but I didn't arrive to open the file.
got this error : 
java.io.FileNotFoundException: ./enregitrements/benoit_25-05_perf.txt (No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:106)
	at java.io.FileInputStream.<init>(FileInputStream.java:66)
	at Replayer.read(Replayer.java:27)
com.cycling74.max.MaxRuntimeException
	at Replayer.read(Replayer.java:30)

here is my source code (yes, I know, it's not really clean code ^^) :

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import com.cycling74.max.*;


public class Replayer extends MaxObject {
	
	private int currentTime = 0 ; 
	private FileInputStream f = null ; 
	private int timestamp = 0 ; 
	private Atom[] currentWords = null ;
	
	public Replayer (){
		super();
		declareIO(1,2);
		String rien = "" ; 
		int[] rienNonPlus = {0, 0} ; 
		currentWords = Atom.newAtom(rien, Atom.newAtom(rienNonPlus));
	}
	
	public void read (String filename){
		System.out.println (filename);
		try {
			f = new FileInputStream (filename);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			throw new MaxRuntimeException () ; 
		}
	}

	
	private void readLine (){
		String word = ""; 
		char caract ;
		Atom[] ret = null ; 
		// recupere timestamp
		try{
			caract = (char) f.read();
			while (caract != ' '){
				word += caract ;
				caract = (char) f.read();
			}
			timestamp = Integer.parseInt(word);
			word = "";
			
			// recupere adresse et arguments
			caract = (char) f.read();
			while (caract != '
'){
				word += caract ;
				caract = (char) f.read();
			}
			currentWords = Atom.parse(word);
		}
		catch (IOException e){
			e.printStackTrace();
			outlet(1, "bang");
			throw new MaxRuntimeException();
		}
	}
	
	// lit et renvoi l'ensemble des lignes pour un temps donnée
	private void readLineB4Time(int time){
		while (time>timestamp){
			outlet (0, currentWords);
			readLine();
		}
	}
	
	public void inlet (int time){
		readLineB4Time (time);
	}
}

and I tried to load the file like this : 
(message : read filename)

----------begin_max5_patcher----------
488.3ocsU0zbaBCD8L7qPildzwAIK7G4V9Kzqoc7HCqsUFPhQRdJtYx+8hj.
GJlT65VeQL7zxtqd58VdKNBuQUCFL5IzKnnn2hih7PNfn12ivk75rBtwGFNS
UVBRKdRXOKTa834ZUE5n5fFM0VaQeStUT.n8fF5BsPHgL0AoOdZKXkFLMoia
EJ45KFgCmzhuUIsFwOAOFcZRKr7PoPV.VS+Xa.UGrcnIiUaMjYC7v7jljgVN
yul5Vmwllf9d6WIx8mW0lWefwv8ZFIuz2L3m0BdQ2NUba1dgbWuBvV3ZWDIk
LrDtO483X2xjq79nDLF9N3r6CMvyQegf+KXK5nrE47ycJ4xm6PFrGqfvgFiO
wfiRIycr.c1R2i.wPVdiThSJ5Te3KnftBoB8OKUXLWixBRE+k5hkehTg94Dy
j9jiaiVC4UPXD1pg09FHLI7ild7LITY8qnuBUE7ifF+O65lcNoPRtEczjgT1
Xzy7UAW0BO830Szj6gEa5ifTC6DVM3lKZdbCHUB6ZZ5CIoqq.8V27v6hMb0+
aWXZv3QYIgGiaC8YvOMevON7Yzg+6boo4mBYc0ua7A5CWRNXrB4I24KenM5E
zdQdNH6O8tTjWoDR6Iyxn2rWaO47mWrmFz326dZ08llZd483eU6NhyK
-----------end_max5_patcher-----------

any Idea?
thanks, 
Thomas.