About Conditional Formatting in the Group Footer

[Suriya]

Dear Sir,
                     i Am Suriya ..  Now i have a doubt in the conditional formatting ... Now i am trying to  change the visible property  at the run time , so i have write the condition in the conditional formatting option in the group footer band.. but it showing error.. whats the reason... it is possible or not...
      reply me soon as possible



Thanks

By
Suriya narayanan S