We experienced the same thing. We are currently testing the softphones during the 30-day evaluation period. Usually it would work for about a day, but the next day I would see "Terminal Manager Connect" with nothing else.
4.2 supposedly fixes this issue along with several others. My problem is that now I cannot get past the "Licensing Failure." Regardless of the 30-day evaluation period, I cannot test further. We are currently waiting for licenses.