I'm exciting about the relase of ANTLR CSHARP and want to migrate my previous translator from C++ to C#, but I found my base example:heteroAST doesn't work. it shows:

S:antlr-2.7.2examplescsharpheteroAST>binheteroast
+-- +
|-- +
| |-- 0
| +-- *
| |-- 0
| +-- 0
+-- 0

0 0 0 0
value is 0

Thanks in advance.