Logical file question

I am having to modify a program written in RPG III,  this program uses a 
multi-format logical.  I need to put in select statments in the logical and 
have done it as shown below.  The program will print from my first logical but 
when it does not find a record in the first it never looks at the second.  If I 
remove the Select statment it works fine.  Can anyone help on this.  I know 
that I could use various other methods to do this, but my time is limited.  I 
would like to stay with changing just the logical becuase there is 7 programs 
that will need to be modified if attaching a select statement will not work.  I 
have looked in some manuals and cannot find it stating this cannot be done. 
Thanks in advance for your help. 

  A***************************************************************
  A          R IPB500BL                  PFILE(BBL)               
  A          K BLDOCR                                             
  A          K BORD                                               
  A          K BLINE                                              
  A          S BLINE                     COMP(LT 900)             
  A*                                                              
  A          R IPS100IL                  PFILE(SIL)               
  A          K ILDOCR                                             
  A          K ILORD                                              
  A          K ILSEQ                                              
  A          S ILSEQ                     COMP(LT 900)             
  A*