There seems to be a bug with this with the latest buldbot builds for Windows.
The problem is if I use setPlayRate() with a number below 1, suc as 0.2 (for slowing down the sequence speed), then the Sequence will stop/not run (this is if you have setPlayRate() after play()/loop()). There didnt seem to be a problem before.
Float numbers higher than 1, for example 1.2, will work though.