Workflow without Association and Instantiation Forms

Hi,

I`d like to make a workflow without Association and Instantiation IP Forms but I have a IP form when the user to approve or reject the task.

When I remove those red lines:

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<Workflow
Name="Sample: State Machine Approval"
Description="Simple workflow that waits for an initial and final approver to sign off and goes back to the author for revision if rejected."
Id="48500BEB-D1BE-4ec4-8D21-5DEF76BEEDDD"
CodeBesideClass="Microsoft.Office.Samples.ECM.Workflow.SPSMWorkflow"
CodeBesideAssembly="Microsoft.Office.Samples.ECM.Workflow.StateMachineApproval, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ec457ebe7d96977c"
TaskListContentTypeId="0x01080100C9C9515DE4E24001905074F980F93160"
AssociationUrl="_layouts/CstWrkflIP.aspx"
InstantiationUrl="_layouts/IniWrkflIP.aspx"
ModificationUrl="_layouts/ModWrkflIP.aspx">

<Categories/>
<!-- Tags to specify InfoPath forms for the workflow; delete tags for forms that you do not have -->
<MetaData>
<Instantiation_FormURN>urn:schemas-microsoft-com:office:infopath:SMWorkflowDemoStartForm:-myXSD-2006-05-21T19-13-08</Instantiation_FormURN>
<Association_FormURN>urn:schemas-microsoft-com:office:infopath:SMWorkflowDemoStartForm:-myXSD-2006-05-21T19-13-08</Association_FormURN>
<Task0_FormURN>urn:schemas-microsoft-com:office:infopath:SMWorkflowDemoApproveForm:-myXSD-2006-04-27T03-00-28</Task0_FormURN>
<Task1_FormURN>urn:schemas-microsoft-com:office:infopath:SMWorkflowDemoReviseForm:-myXSD-2006-04-27T03-11-15</Task1_FormURN>
<Task2_FormURN>urn:schemas-microsoft-com:office:infopath:SMWorkflowDemoApproveForm:-myXSD-2006-04-27T03-00-28</Task2_FormURN>

<StatusPageUrl>_layouts/WrkStat.aspx</StatusPageUrl>
</MetaData>
</Workflow>
</Elements>

My workflow stop and show a error "Error Ocurred".

In OnWorkflowActivated I removed the handler.

Help me please

Thanks

Att