[collectd] rrdtool plugin for collectd does not generate any files

[Michael Lubinsky]

The rrdtool plugin for collectd 5.0.4 on SUS linux 11.1 does not generate any files.How to fix it?---------LoadPlugin rrdtool<Plugin rrdtool>        DataDir "/var/lib/collectd/rrd"        CacheTimeout 120        CacheFlush   900</Plugin>
-----tail /var/log/collectd.log[2012-06-05 23:35:20] plugin_dispatch_values: No data sets registered. Could the types database be read? Check your `TypesDB' setting!
Thanks!Michael. 		 	   		  
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