How to access individual records of a sub-form in a report

How to access individual records of a sub-form in a report

Hi,

My report is based on a form which has a sub-form. I am not able to access individual records of sub-form. I can not put any filter nor I can group on any field in the sub-form

All sub-form fields are shown together in the report with whatever separator I use. Not able to show them in different columns. Also filters and grouping does not work on the sub-form columns as mentioned earlier.

Please help.

Milind