textstring library

Has anyone used the textstring library.

I've uploaded the example onto the board, but it is not responding as it should.

The welcome message comes up in zterm, but whenever I try to enter a string for it to process and reply to it Zterm starts a new line as I type each character rather than waiting till I hit return.

If I turn local echo off then I just get the cursor moving down the page as I type each letter - the only thing coming back seems to be a return!

Anyone had any experiences with it?