Prototype error

What am I doing wrong?  I'm trying to create a procedure for building a 
customer id, and I'm not getting anywhere.
I get the error:
*RNF7535 30      2 The type and attributes of the parameter do not match 
those
                   of the prototype.  

Here's my code for the prototype and procedure:

      //--------------------------------------------------
      // Procedure name: Create_CustId
      // Purpose:        Creates customer Id.
      // Returns:        Customer Id
      //--------------------------------------------------
     D Create_CustId   PR            22
     D  inStreet                      4S 0
     D  inCivic                      10
     D  inUnit                        5 


         Wccustid = Create_Custid(Wcstreet#:Wccivic#:Wcunit); 

      //--------------------------------------------------
      // Procedure name: Create_CustId
      // Purpose:        Create Customer Id
      // Returns:        Customer Id
      //--------------------------------------------------
     P Create_CustId   B
     D Create_CustId   PI            22
     D  inStreet                      4S 0
     D  inCivic                      10
     D  inUnit                        5
      // Local fields
     D Cust_Id         ds            22
     D  Cust_Street                   4    Overlay(Cust_Id:*Next)
     D  Cust_Civic                   10    Overlay(Cust_Id:*Next)
     D  Cust_Unit                     5    Overlay(Cust_Id:*Next)
     D  Cust_Seq                      3    Overlay(Cust_Id:*Next)
     D retField        s             22
     D Valid                           N
      /FREE
         Cust_Street = %Editc(inStreet:'X');
         Cust_Civic = inCivic;
         Cust_Unit = inUnit;
         Seq = 1;
         Cust_Seq = %Editc(Seq:'X');
         retField = Cust_Id;
         // Check that we don't already have this id, if we do, increase 
the seq number portion
         Valid = *Off;
         DoW Valid = *Off;
           Chain retField Wcustomer;
           If %Found(Wcustomer);
             Seq += 1;
             Cust_Seq = %Editc(Seq:'X');
             retField = Cust_Id;
           Else;
             Valid = *On;
           EndIf;
         EndDo;
         Return retField;
      /END-FREE
     P GetDate         E 

Ron Power
Programmer
Information Services
City Of St. John's, NL
P.O. Box 908
St. John's, NL
A1C 5M2
Tel: 709-576-8132
Email: rpower@xxxxxxxxxx
Website: http://www.stjohns.ca/
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