Cannot find multipart in BEA Weblogic sp4

[utkarsh...@algorismtech.com]

Hi All,

I have updated my application from BEA weblogic 8.1 SP2 (Integration
domain) to SP4.
In one module I am using the
<netui:fileUpload dataSource="{actionForm.file}"/> bea control.

in pageflow {actionForm.file} is defined as following

public static class AddFileForm extends FormData
{
private String test;
public FormFile file;

public void setTest(String test)
{
this.test = test;
}

public String getTest()
{
return this.test;
}
}

when i upload a file and click on submit button I get the following
error:

Cannot find multipart class
"com.bea.wlw.netui.pageflow.upload.PageFlowMultipartRequestHandler",
exception:
com.bea.wlw.netui.pageflow.upload.PageFlowMultipartRequestHandler

Can somebody help me on this error? what can be the reason?

Thanks in advance,
Utkarsh