The URL is http://localhost:8983/solr/select/?q=solr&version=2.2&start=0&rows=10&indent=on When i added &echoParams=explicit to the query nothing has changed. But when I find and replaced the word 'explicit' to uppercase 'EXPLICIT' in the solrconfig.xml it worked. The problem has solved. Thanks for your help.
hymmm. what version are you using? I'm confident that /trunk accepts any case: v = v.toUpperCase(); if( v.equals( "EXPLICIT" ) ) { return EXPLICIT; } ryan