why the j2ee perspective in wtp eclipse disappear

I found I can't even open the j2ee perspective in wtp eclipse. The whole panel of j2ee perspective disappeared and  let other panels occupied the space. The java browsing, java, etc perspectives are still there. How can I fix this.

Thanks
ly_uwoAsked:
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DarthModConnect With a Mentor Commented:
PAQed with points refunded (500)

DarthMod
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ShoikanaCommented:
What is wtp eclipse?  Is it like the baseline Eclipse?  I use baseline Eclipse, but I don't know if it is different from your version..
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Ajay-SinghCommented:
checkout what the error-log is saying.
GoTo: Windows->Preferences->Show View->Error Log
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suprapto45Commented:
I think that you can have a look at your perspective in Eclipse.

David
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ly_uwoAuthor Commented:
I found it probably was a problem of the j2ee projects it created. I followed an example of wtp eclipse documentation to build an ejb application (this example's name is school scheduler, which can be found on the wtp tutorial on eclipse website). Probably that one is for wtp version 0.7. After I followed the steps, finally j2ee perspective is lost, it seemed it has indicated some kinds of java tool/facet problems. Now I installed a fresh new eclipse, and create other j2ee applications and don't have the problem.

Can someone give me a hint on why that happens?

Thanks.
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ly_uwoAuthor Commented:
maybe it is because in j2ee perspective, you can only have one project. So if you have several projects, it won't show and you have to open a single project in new window, and then it would be alright?

Anyone can confirm me that I will give him all 500 points.
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