Crystal report if then else error

    If {Command.payment_ind_vsl}= 'F' Then 
    'Completed'
Else If {Command.payment_ind_ci} = 'F' Then 
         'Completed'
Else If {Command.payment_ind_mi} = 'F' Then 
        'Completed'
     Else 
       'In Progress'

I have try some code from the site but the result is also an error. is there any other ways that i can try to solve it.