open a file folder then exit automatically

[Foley]

I have a folder named "guanzhan.sikuli" in desktop, sikuli-ide exit automatically when I try to open this folder, this is strange because everything is normal ten minutes earlier.
I copy all files in "guanzhan.sikuli" to "guanzhan1.sikuli", then sikuli-ide can open "guanzhan1.sikuli" successfully, but when I try to open "guanzhan.sikuli" again, sikuli-ide still exit automatically.
I also try to open "guanzhan1.sikuli" first, then use "save as" to replace "guanzhan.sikuli", this time "guanzhan.sikuli" is opened in sikuli-ide, but when I restart sikuli-ide and try to open "guan.sikuli" again, sikuli-ide exit automatically again.
I'm using sikuli 1.0.1 and jre7, win7 64

[Foley (zslong1988)]

I find the reason, it's because a png file is named "guanzhan.png", which hava the same name with "guanzhan.sikuli"