Java EE (Java Enterprise Edition) General Discussion

I am new to J2EE appserver and am now praticing container managed persistence. I am now getting some errors deploying my application. I have set up all my persisttence fields my find/Select queriesa my cmp database.. and my relationships. The two beans I am using are EmployeeBean and QualificationBean. The relationship as also been set up. I am really stuck and need your assistance. Here is the depoyment error I am getting:


distribute: C:\ejb\hr\myapp.ear
deployment started : 0%
Deploying application in domain failed; Fatal Error from EJB Compiler -- Compilation failed: Native compiler returned an error: 1
Error messages are: C:\Sun\AppServer\domains\domain1\generated\ejb\j2ee-apps\myapp\hris\server\qualifications\QualificationsBean218078443_ConcreteImpl.java:422: ejbCreate(java.lang.String,java.lang.String,boolean,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) in hris.server.qualifications.QualificationsBean218078443_ConcreteImpl cannot override ejbCreate(java.lang.String,java.lang.String,boolean,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) in hris.server.qualifications.QualificationsBean; attempting to use incompatible return type
found : java.lang.String
required: int
public java.lang.String ejbCreate (java.lang.String param0,
^
Note: C:\Sun\AppServer\domains\domain1\generated\ejb\j2ee-apps\myapp\hris\server\employee\EmployeeBean_2012980106_ConcreteImpl.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

; requested operation cannot be completed

!!! Operation Failed !!!
!!! With The Following Failure Messages !!!
Deploying application in domain failed; Fatal Error from EJB Compiler -- Compilation failed: Native compiler returned an error: 1
Error messages are: C:\Sun\AppServer\domains\domain1\generated\ejb\j2ee-apps\myapp\hris\server\qualifications\QualificationsBean218078443_ConcreteImpl.java:422: ejbCreate(java.lang.String,java.lang.String,boolean,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) in hris.server.qualifications.QualificationsBean218078443_ConcreteImpl cannot override ejbCreate(java.lang.String,java.lang.String,boolean,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String) in hris.server.qualifications.QualificationsBean; attempting to use incompatible return type
found : java.lang.String
required: int
public java.lang.String ejbCreate (java.lang.String param0,
^