[TxMt] capturing all text in a scope

Hi suppose the caret is somewhere inside a scope meta.myscope delimited by two keywords beginmyscope and endmyscope. I need to capture all the text in the region between beginmyscope and endmyscope. I thought the Input type "Selected Text or Scope" might do exactly this, but I'm seeing something different: only the text from the line where the caret is to endmyscope is captured. Is this the intended behaviour, or I'm doing something wrong? I think the scope is defined correctly since ctr-shift-P shows that the entire region between beginmyscope and endmyscope is correctly parsed as meta.myscope. What's wrong?

Thanks Piero