getting [1,1] expecting: EOF no matter what

["Jorge Mario G. Mazo" <vadersolo@xxxxxxxxx>]

Hi there
I'm very new to sablecc, but no matter what I try I alwats get the same error
here is my grammar

Package org.sablecc.baba;

Helpers
   digitos 	= ['0'..'9'];
   letras 	= ['A'..'Z']|['a'..'z'];
   caracteres 	= ' '|digitos|letras;
   lf 		= 10;
   cr 		= 13;
   eol 	= cr lf | cr | lf;
   blank 	= 10 | 10 13 | 9 | ' ';

Tokens

   if		= 'if';
   then	= 'then';
   else	= 'else';
   while	= 'while';
   for		= 'for';
   end		= 'end';
   do		= 'do';

   numero	= digitos+;
   variable 	= letras(letras|digitos)*;

   endofline 	= eol;
   blanktoken 	= blank+;

Ignored Tokens
   endofline,
   blanktoken;

Productions
   programa =
	lista_decl;

   lista_decl =
       decl*;

   decl =
       variable;

   lista_instr =
       instr*;

   instr =
	{declaracion} decl |

	{if} if variable then lista_instr end |

	{while} while variable do lista_instr end

       {for}  for variable do lista_instr end;
==========================================
and here is the java code I'm using
==========================================
import java.io.FileReader;
import java.io.PushbackReader;
import org.sablecc.baba.lexer.*;
import org.sablecc.baba.node.*;
import org.sablecc.baba.parser.*;
import java.io.*;

public class Main {
   public static void main(String args[]) {
   if (args.length < 1) {
       System.out.println("Usage:");
       System.out.println("java Main <filename>");
   }

   try {
       Lexer lexer = new Lexer(new PushbackReader(new
BufferedReader(new FileReader(args[0])),1024));

       Parser parser = new Parser(lexer);

       Start ast = parser.parse();
   }
   catch (Exception e) {
       System.out.println(e.toString());
   }
   }
}

-------------
I dont know what I'm doing wrong
any help would be apreciated