Delete An Associate From The File Programatically

Hi,
I need to delete an associate from the file but I'm having some trouble, can someone let me know how it's done correctly please. I've tried this...

Code:


foreach(Associate del in CurrentFile.Associates)
{
    if(del.ID == Convert.ToInt64(task1.Notes))
    {
        CurrentFile.Associates.Remove(del.Contact);
        CurrentFile.Update();
        break;
    }
}


but get this error message on CurrentFile.Update():

Code:


Detail: System.Data.DeletedRowInaccessibleException: Deleted row information cannot be accessed through the row. at System.Data.DataRow.BeginEditInternal() at System.Data.DataRow.set_Item(DataColumn column, Object value) at System.Data.DataRow.set_Item(String columnName, Object value) at FWBS.OMS.OMSFile.Update()


and I've tried this bit of code, but nothing happens:

Code:


foreach(Associate del in CurrentFile.Associates)
{
    if(del.ID == Convert.ToInt64(task1.Notes))
    {
        del.Delete();
        del.Update();
    }
}
CurrentFile.Update();


any ideas?

thanks
Mike