NoClassDefFoundError错误

我在/etc/profile下设置了环境变量：
#set java environment
JAVA_HOME=/usr/java/jdk1.6.0_17
EXTERNAL_LIB=/home/daowu/relevance/Farseer2/Lib
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$EXTERNAL_LIB/wvtool.jar:$EXTERNAL_LIB/je-analysis-1.5.1.jar:$EXTE
RNAL_LIB/lucene-core-2.4-dev.jar:$EXTERNAL_LIB/commons-dbcp-1.2.2.jar:$EXTERNAL_LIB/jdom.jar:$EXTERNAL_LIB/mysql-connector-ja
va-5.0.8-bin.jar
PATH=$JAVA_HOME/bin:$PATH:.:
export JAVA_HOME CLASSPATH PATH我执行在/home/daowu/relevance/Farseer2/bin/probabilityModel下执行
java GenSegmentWords
出现错误
Exception in thread "main" java.lang.NoClassDefFoundError: GenSegmentWords (wrong name: probabilityModel/GenSegmentWords)