Losing Settings on Load

I've only noticed this on JST Toneforge at this time, an amp SIM I use on guitars, and every time I load my song that particular plugin loses my settings. Haven't had a problem with any others at this time. So for now I just basically have to freeze or print the guitar tracks in order to preserve the SIM settings, unfreezing also loses their settings. Just thought I'd bring it to attention, maybe it's a problem with Sonar, or maybe it's the plugin. Anyone else have this happen?