Light Converse - Slow performance

-mac book pro/bootcamp windows 7
- fullboar 4 OS 2.1.2
- LC 55 (latest release)
- hog 4 pc 0S 2.1.2
- hog connect 2.1.2
-----------------------------------------------

- last year OS 1.6.1 (i think), i programmed a festival using lightconverse, everything was fine

- today, i opened the file again, try to prepare it for the same festival this year, but now, some fixtures (par cans !!) react very slow

- movings and 8-lights react immediatly

- tried to install all components again...same result

ideas ?!