Need help on using ANTLR3 library for Objective-C

[madhavnv]

This is Madhav from Bangalore, India. I am using ANTLR3-ObjC2.0-Runtime
library from the URL(https://github.com/muggins/ANTLR3-ObjC2.0-Runtime) for generating code in Objective-C. I needed your help to debug the problem i am facing which is explained below.

My input would be some thing like this:-

abc1 = new abc(100) // abc1 is an object of class abc...something like this
xyz22 = new xyz(30)
abc1
xyz22 and so on...

For this the grammar file looks like:-
/*****************************************************************************************************/
options{
output=AST;
language=ObjC;
ASTLabelType=CommonTree;
}

@Header {
}

@lexer::header {
}

@members {
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
}

@memVars {
NSMutableDictionary *dict;
}

@init {
dict = [[NSMutableDictionary alloc] init];
}

prog: stat+;

stat : ID {
NSString *v = [dict objectForKey:$ID.text];
NSLog(@"id=%@\n",v);
} |

     ID '=' NEW WORD LPARN NUMBER RPARN NEWLINE
     {
            [dict setObject:$WORD.text forKey:$ID.text];
            NSLog(@"new= \%@\n",$NEW.text);
            NSLog(@"word= \%@\n",$WORD.text);
     }
| NEWLINE
;

NEW : ('n''e''w');
NUMBER: '0'..'9'+;
WORD: ('a'..'z'| 'A'..'Z')+;
ID: ('a'..'z'| 'A'..'Z')+('0'..'9')+;
LPARN : '(';
RPARN : ')';
COMMA : ',';
NEWLINE:'\r'? '\n' ;
WS : (' ' | '\t') {$channel=HIDDEN;} ;

/*****************************************************************************************************/
For the above mentioned grammar and input file, build/compilation everything is success, but while i run i get something like:-

missing NEW at 'new' (even though there is new in the input)
and
extraneous input 'abc' expecting LPARN

So i needed help in debugging above statements and in the NSLog print iam getting new=(null) but i expect new=new and word=abc.

But strange aspect is, in the above grammar file if i re-order the lexer tokens by moving the NUMBER:'0'..'9'+ token to after the WORD token, everything works perfectly. This is really strange.

Please point the mistakes i am doing or is this a bug in the antlr3/library. Awaiting your response. Thank you.