Make sure that your jbosscmp-jdbc.xml file conforms to the DTD in the RC release that you are using.
I think it has changed since the alpha release.
I have already checked it,the xml conforms to the dtd .
still i have this problem.
Check the content of .../jboss-3.0.0RC1/server/default/conf/standardjbosscmp-jdbc.xml for the database that you have selected.
The error message is referring to a missing <row-locking-template> tag, which typically appears in this file.
Alternatively, perhaps you are using your own <type-mappings> somewhere.