i have found the problem, i have install v1.39 64bit 20150629 over the old version 1.38, which i thought the version will update it self after install,
but found out there are two version in my pc after install. so delete both and do a fresh install,
now everything work fine,
hello,
i am using windows 7 sp1 64bit, with 2 monitor,
bitcomet 64bit 20150629 version, floating windows is missing when using these version,
version 1.38 floating windows is ok when use
thank you