Record does not "check in" after workflow is complete

Hi All,

I have built a very simple workflow as below

1. start step

2. process step

3. approve step

4. stop step

in the fourth step that is the stop step i have selected "check in" so that the record automatically check's in after the process is complete,

but the record does not check in and the data manager shows it as in workflow. please help

Thanks in Advance

Sharma.