[thredds] Question about TDS4.2 WMS

Hello,

We recently updated to Thredds4.2. When I tried to access WMS, it turns back the following error:


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 HTTP Status 500 - Internal Server Error

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*Status* 500 - Internal Server Error

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     THREDDS Data Server Version 4.0 -- Documentation
     <http://www.unidata.ucar.edu/projects/THREDDS/tech/TDS.html>


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I am new in using Thredds. I would really appreciate if anyone could help me in this.


Thanks a lot,
Li