Error running plugin

Getting this error when running the plugin.

java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/usr/local/nagios/libexec/,file:/usr/local/nagios/libexec/sqljdbc.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
at java.net.URLClassLoader.findClass(libgcj.so.10)
at java.lang.ClassLoader.loadClass(libgcj.so.10)
at java.lang.ClassLoader.loadClass(libgcj.so.10)
at java.lang.Class.forName(libgcj.so.10)
at SqlJobMon.main(SqlJobMon.java:97)
UNKNOWN: