selectKey and MySql problem

[Lieven De Keyzer]

I've searched the archive for this issue, but still couldn't solve it.
I'm working on a webbased application using Struts 1.2.4, iBatis SQL Maps 
2.0 and iBatis DAO Framework. I also try to stick close to the concept of 
JPetStore 4.0.5.

The problem I encounter is with the <selectKey> stanza.
These are in Folder.xml
 <typeAlias alias="folder" type="com.vub.bookmarked.domain.Folder"/>
 <resultMap id="folderResult" class="folder">
   <result property="folderId" column="folder_id"/>
   <result property="parentId" column="parent_id"/>
   <result property="owner" column="owner"/>
   <result property="foldername" column="foldername"/>
 </resultMap>
 <insert id="insertFolder" parameterClass="folder">
  INSERT INTO folder (parent_id, owner, foldername)
  VALUES (#parentId#, #owner#, #foldername#)
   <selectKey resultClass="int" keyProperty="folderId">
     SELECT LAST_INSERT_ID() AS folderId
   </selectKey>
 </insert>
I catch this key in FolderSqlMapDao.java:
 public int insertFolder(Folder folder) {
   int key = update("insertFolder", folder);
   return key;
 }
But this key always seems to be the first inserted element, so 1 . For all 
the folders that get inserted afterwards, selectKey always returns this 1.