Component Palette cannot show in Jdeveloper IDE

I startup Jdeveloper 11g studio edition version 11.1.2.3.0 with all features option selected, but cannot see the Component Palette panel(only can see a grey blank area at the up-right corner in Jdev IDE).
and when I open the SummitADF application example, click the index.jspx file, in the opened "design" view for index.jspx, only text-style is displayed.
What's the matter? need helps!
By the way, I run the jdev in Windows 7.
Thanks.
BAO

It works by "reset window factory settings"-the Component Palette appears now.
and it also works by selecting memu "View-Component Palette(ctrl+shift+p)".
but there is still another half problem:
Even I have startuped the jdev by SELECT ROLE :STUDIO DEVOLOPER(ALL FEATURES) ,
but when i open/new a *.jspx file, only a text-style component structure is displayed instead of WYSIWYG style display in the opened "design" view.
--Anyway it's great for i can get help almost on time(in demand) from this forum! many thanks!

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BUMP
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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Report an error:when i click the "component palette" in View menu

java.lang.NullPointerException
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Hi All,
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Component Palette Exception

Each time i try to open the component palete i get this exception :
java.lang.NullPointerException
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          EventDispatchThread.java:98
     void java.awt.EventDispatchThread.pumpEvents(java.awt.Conditional)
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     void java.awt.EventDispatchThread.run()
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Daniel Campelo

Hi Daniel,
I had the same problem.
Try it:
1-Backup the pallete.xml file located into <jdev install dir>/systemX.X.X.XXXX (X.X.X.XXXX is the version number)
2-Copy the pallete.xml file located into <jdev install dir>/multi/system to <jdev install dir>/systemX.X.X.XXXX
I hope this help
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Component Palette cannot show in Jdeveloper IDE

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