I am using MyEclipse 6.0.1 IDE for developing Hibernate application i got following error please help me

21:44:47,437 INFO Environment:479 - Hibernate 3.1.3
21:44:47,437 INFO Environment:509 - hibernate.properties not found
21:44:47,437 INFO Environment:525 - using CGLIB reflection optimizer
21:44:47,453 INFO Environment:555 - using JDK 1.4 java.sql.Timestamp handling
21:44:47,500 INFO Configuration:1308 - configuring from resource: /hibernate.cfg.xml
21:44:47,500 INFO Configuration:1285 - Configuration resource: /hibernate.cfg.xml
21:44:47,703 INFO Configuration:469 - Reading mappings from resource: p1/Employee.hbm.xml
21:44:47,796 INFO HbmBinder:309 - Mapping class: p1.Employee -> EMPLOYEE
21:44:47,812 INFO Configuration:1419 - Configured SessionFactory: null
21:44:47,984 INFO DriverManagerConnectionProvider:41 - Using Hibernate built-in connection pool (not for production use!)
21:44:47,984 INFO DriverManagerConnectionProvider:42 - Hibernate connection pool size: 20
21:44:47,984 INFO DriverManagerConnectionProvider:45 - autocommit mode: false
21:44:48,015 INFO DriverManagerConnectionProvider:80 - using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@localhost:1521:ORACLE
21:44:48,015 INFO DriverManagerConnectionProvider:86 - connection properties: {user=scott, password=****}
21:44:48,234 INFO SettingsFactory:77 - RDBMS: Oracle, version: Oracle9i Enterprise Edition Release 9.0.1.1.1 - Production
With the Partitioning option
JServer Release 9.0.1.1.1 - Production
21:44:48,234 INFO SettingsFactory:78 - JDBC driver: Oracle JDBC driver, version: 9.2.0.8.0
21:44:48,265 INFO Dialect:103 - Using dialect: org.hibernate.dialect.Oracle9Dialect
21:44:48,265 INFO TransactionFactoryFactory:31 - Using default transaction strategy (direct JDBC transactions)
21:44:48,265 INFO TransactionManagerLookupFactory:33 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
21:44:48,265 INFO SettingsFactory:125 - Automatic flush during beforeCompletion(): disabled
21:44:48,265 INFO SettingsFactory:129 - Automatic session close at end of transaction: disabled
21:44:48,265 INFO SettingsFactory:136 - JDBC batch size: 15
21:44:48,265 INFO SettingsFactory:139 - JDBC batch updates for versioned data: disabled
21:44:48,265 INFO SettingsFactory:144 - Scrollable result sets: enabled
21:44:48,265 INFO SettingsFactory:152 - JDBC3 getGeneratedKeys(): disabled
21:44:48,265 INFO SettingsFactory:160 - Connection release mode: auto
21:44:48,281 INFO SettingsFactory:187 - Default batch fetch size: 1
21:44:48,281 INFO SettingsFactory:191 - Generate SQL with comments: disabled
21:44:48,281 INFO SettingsFactory:195 - Order SQL updates by primary key: disabled
21:44:48,281 INFO SettingsFactory:338 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
21:44:48,281 INFO ASTQueryTranslatorFactory:24 - Using ASTQueryTranslatorFactory
21:44:48,281 INFO SettingsFactory:203 - Query language substitutions: {}
21:44:48,281 INFO SettingsFactory:209 - Second-level cache: enabled
21:44:48,281 INFO SettingsFactory:213 - Query cache: disabled
21:44:48,281 INFO SettingsFactory:325 - Cache provider: org.hibernate.cache.EhCacheProvider
21:44:48,281 INFO SettingsFactory:228 - Optimize cache for minimal puts: disabled
21:44:48,281 INFO SettingsFactory:237 - Structured second-level cache entries: disabled
21:44:48,281 INFO SettingsFactory:257 - Echoing all SQL to stdout
21:44:48,281 INFO SettingsFactory:264 - Statistics: disabled
21:44:48,281 INFO SettingsFactory:268 - Deleted entity synthetic identifier rollback: disabled
21:44:48,281 INFO SettingsFactory:283 - Default entity-mode: pojo
21:44:48,312 INFO SessionFactoryImpl:154 - building session factory
21:44:48,312 DEBUG CacheManager:191 - Creating new CacheManager with default config
21:44:48,312 DEBUG CacheManager:164 - Configuring ehcache from classpath.
21:44:48,312 WARN Configurator:126 - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/C:/Program%20Files/MyEclipse%206.0/myeclipse/eclipse/plugins/com.genuitec.org.hibernate.eclipse_6.0.1.zmyeclipse601200710/myeclipse-data/3.0/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
21:44:48,328 DEBUG Configuration$DiskStore:185 - Disk Store Path: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\
21:44:48,453 INFO SessionFactoryObjectFactory:82 - Not binding factory to JNDI, no JNDI name configured
org.hibernate.MappingException: Unknown entity: p1.EmployeeId

help me thanks in advance

21:44:48,281 INFO SettingsFactory:325 - Cache provider: org.hibernate.cache.EhCacheProvider

...

21:44:48,312 DEBUG CacheManager:164 - Configuring ehcache from classpath.
21:44:48,312 WARN Configurator:126 - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/C:/Program%20Files/MyEclipse%206.0/myeclipse/eclipse/plugins/com.genuitec.org.hibernate.eclipse_6.0.1.zmyeclipse601200710/myeclipse-data/3.0/lib/ehcache-1.1.jar!/ehcache-failsafe.xml


you are saying hibernate that you are going to use a cache manager called ehCache,
but then you haven't configured it.