javax.jcr.RepositoryException: Unable to aquire read lock.

[CJ]

I am trying to setProperty on a javax.jcr.Node when I get the read lock 
exception.  I tried setting the following property in the workspace file.

<ISMLocking class="org.apache.jackrabbit.core.state.FineGrainedISMLocking"/>
I still get the same read lock exception.

Any suggestions to change this?

Thanks.