[antlr-interest] System.TypeLoadException when using namespace for my own AST in C#

[kototama kototama]

Hello,

I have something like this in my grammar file for the parser :

headers {
 using Ktmc;
}

[...]

tokens {
[...]
METHOD_DEF<AST=MyAST>;
}

and MyAST is defined like this (I use C# and antlr 2.7.6) :

namespace Ktmc
{
    class MyAST : antlr.CommonAST
    {
[...]

It doesn't work at all !!! When running the application I've got the
following problem :

Error : System.TypeLoadException: Unable to load AST Node Type: 'MyAST'
   at antlr.ASTFactory.loadNodeTypeObject(String nodeTypeName)

What is surprising is that it works perfectly well if I doesn't put MyAST in
a namespace! Any ideas ?
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