Domain attributes are not writable if extended from class

[silly_me]

Has anyone experienced class attributes that are silently not written to?

I have a super class called:

public class BaseSystem {
  protected String rowid;

  public void setRowId(String rowId) {
    this.rowid = rowId;
  }
  public String getRowId() {
    return this.rowId;
  }
}

public class Company extends BaseSystem implements Serializable {
  private String companyName;
  public void setCompanyName(String name) {
    this.companyName = name;
  }
  
  public String getCompanyName() {
     return this.companyName;
  }
}

Now when in my sqlmap file I have

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMap PUBLIC "-//iBATIS.com//DTD SQL Map 2.0//EN" "http&#58;//www.ibatis.com/dtd/sql-map-2.dtd">

<sqlMap namespace="Company">
  <insert id="addCompany">
    insert into company &#40;rowid, name&#41;
    values &#40;#rowId#, #companyName#&#41;
  </insert>
</sqlMap>

In my DAO implementation I have

public class SqlMapCompanyDao extends SqlMapClientDaoSupport implements CompanyDao {
  public void addCompany(Company company) {
    getSqlMapClientTemplate().insert("addCompany", company);
  }
}

However when I try to read/write the rowid I always get a null. I can read/write the company name, but the rowid seems to always be null. Is this configuration unsupported? Does my Company object need to explicitly specify the rowid instead of inheriting it from Base??

Any help would be appreciated.

[silly_me]

Rrrr!! I forgot to implement the Serializable in the Base class!! That was why..