Deployment Prepare commit phase failed, Failed to prepare transaction

We are having problems trying to publish or unpublish certain pages and structure groups after upgrading to SDL Tridion 5.2 through 2011 SP1.

The completion of the publishing transaction occurs at the stage of completion of the deployment, and the following error message appears:

Phase: Deployment Preparing the commit phase failed, Failed to prepare the deal: tcm: 0-682623-66560, null, null

The cd_deployer.exe service also runs at almost 100% CPU utilization at the same time.

We also get the following information in the cd_deployer.log and cd_core.log files:

2012-05-02 07:32:09,346 ERROR DeployPipelineExecutor - Unable to start processing deployment package with transactionId: tcm:0-682520-66560
2012-05-02 07:36:36,071 ERROR DeployPipelineExecutor - Final attempt in Phase: Deployment Prepare Commit Phase failed for transaction: tcm:0-682526-66560
2012-05-02 07:36:36,071 ERROR DeployPipelineExecutor - Original stacktrace for transaction: tcm:0-682526-66560
com.tridion.deployer.ProcessingException: Unable to prepare transaction: tcm:0-682526-66560, null, null
    at com.tridion.deployer.phases.PreCommitPhase.handleFailure(PreCommitPhase.java:120) ~[cd_deployer.jar:na]
    at com.tridion.deployer.phases.PreCommitPhase.execute(PreCommitPhase.java:101) ~[cd_deployer.jar:na]
    at com.tridion.deployer.phases.DeployPipelineExecutor.runMainExecutePhase(DeployPipelineExecutor.java:186) [cd_deployer.jar:na]
    at com.tridion.deployer.phases.DeployPipelineExecutor.doExecute(DeployPipelineExecutor.java:97) [cd_deployer.jar:na]
    at com.tridion.deployer.phases.DeployPipelineExecutor.execute(DeployPipelineExecutor.java:61) [cd_deployer.jar:na]
    at com.tridion.deployer.TransactionManager.handleDeployPackage(TransactionManager.java:80) [cd_deployer.jar:na]
    at com.tridion.deployer.queue.QueueLocationHandler$1.run(QueueLocationHandler.java:176) [cd_deployer.jar:na]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [na:1.6.0_30]
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) [na:1.6.0_30]
    at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.6.0_30]
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) [na:1.6.0_30]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.6.0_30]
    at java.lang.Thread.run(Unknown Source) [na:1.6.0_30]

. , , , .

, DCP . , , , .

- , ?

EDIT: , . " " 5 , cd_deployer , , , .

, , . !

EDIT 2: , cd_storage_conf.xml :

<Storage Type="filesystem" Class="com.tridion.storage.filesystem.FSDAOFactory" Id="21_content" defaultFilesystem="false">
    <Root Path="D:/WebSites/live/Website/wwwroot/" />
</Storage>
<Storage Type="filesystem" Class="com.tridion.storage.filesystem.FSDAOFactory" Id="21_data" defaultFilesystem="true" defaultStorage="true">
    <Root Path="D:/WebSites/live/Website/Data" />
</Storage>

<Publication Id="21" defaultStorageId="21_data" cached="false">
    <Item typeMapping="Page" cached="false" storageId="21_content"/>
    <Item typeMapping="Binary" storageId="21_content" cached="false"/>
    <Item typeMapping="ComponentPresentation" storageId="21_data"/>
</Publication>  

.