[antlr-interest] Version Problem

[Mohammed Ibrahim]

hello folks ,

i have a problem in here , i would like to parse this string
=======================================
antlr / 2.0    <----- this string
=======================================
i wrote for it this EBNF


VERSION : LETTER DECIMAL;

DECIMAL : INT ('.' INT)+;

LETTERS: 'a'..'z'+;

INT:  '0'..'9'+;

WS : ( '  ' |'\r'|'\n'|'/') +  { skip(); };
==========================================

It doesn't want to recognize it i don't want why ?????
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