override problem in AX 2012 with VS 2010


I have a strange problem while using VS 2010 with AX 2012. I have a X++ class (ImportFile) in my AX and one of the method in the class is like this

protected boolean processFile(Filename _fileName)

{ return true;


I have created a classlibrary in my VS 2010, added the ImportFile class to my project, when i inherit the class and try to override the ProcessFile method, i cannot see the method ?

Can someone explain me and what should i do in the base class to make it visible in my VS project ?

Thanks & Regards,


How does the signature of processFile() look in the proxy class?