JPopup menu can't be shown in linux 7.3

I attach a jpopup menu to a textarea. It pops up properly in Windows environment. But it can't be shown in linux 7.3. Anyone knows why? Any work around for it? Thanks.
[175 byte] By [jen-2005a] at [2007-10-2 5:23:45]
# 1
When it's supposed to show does it simply not show or is an error thrown?
wes_614a at 2007-7-16 1:25:34 > top of Java-index,Desktop,Core GUI APIs...
# 2
It doesn't show when it's supposed to show. The mouse action and trigger action can all be captured. There is no error thrown.
jen-2005a at 2007-7-16 1:25:34 > top of Java-index,Desktop,Core GUI APIs...
# 3
Solved. I should show popup when mouse press action happens as well.
jen-2005a at 2007-7-16 1:25:34 > top of Java-index,Desktop,Core GUI APIs...