TTS-1 never supported anything higher than 96kHz. It runs at 44.1, 48 and 96kHz only. At 96kHz the plug-ins must be set to light load mode which is a per-instance session setting. There is a bug with the on/off button in the tone section. Pretty sure it has been broken for some time. This plug-in was made in Japan by Roland. Cakewalk never had the source code so BandLab does not either. You could try installing the 64bit TTS-1 bundled with SONAR 6 and see if it works better.  
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