Crystal Reports Searching and Array

Message

     I have the following code that I am using to build a string based on values of an array:

local stringVar array a := {@Dept_Array};
local numbervar b:=1;
Global Stringvar DeptString;
for b:=1 to ubound(a)
do 
if left(a,7) = "5000001"
    then DeptString:= DeptString + 'Public Consulting Group' + chrw(13) 
else if left(a,7) = "5000002"
    then DeptString:= DeptString + 'Health And Human Services' + chrw(13)
else if left(a,7) = "5000006"
    then DeptString:= DeptString + 'Education' + chrw(13)
else if left(a,7) = "5000008"
    then DeptString:= DeptString + 'Corporate '  + chrw(13) 
else if left(a,7) = "5000012"
    then DeptString:= DeptString + 'IT' + chrw(13)
else if left(a,7) = "5000741"
    then DeptString:= DeptString + 'CRM' + chrw(13)
else if left(a,7) = "5000961"
    then DeptString:= DeptString + 'Technology Consulting' + chrw(13) 
else
    DeptString :=    'Corporate' + cstr(ubound(a)) + chr(13) + chr(10) + 
                     'Education' + chr(13) + chr(10) +
                     'Enterprise Architecture Solutions' + chr(13) + chr(10) +
                     'Enterprise Program Services' + chr(13) + chr(10) +
                     'Enterprise Technology Solutions' + chr(13) + chr(10) +
                     'Health & Human Services' + chr(13) + chr(10) +
                     'IEP Online' + chr(13) + chr(10) +
                     'IT' + chr(13) + chr(10) +
                     'LTI' + chr(13) + chr(10) +
                     'Pacific North West' + chr(13) + chr(10) +
                     'Project Management Solutions' + chr(13) + chr(10) +
                     'Public Consulting Group' + chr(13) + chr(10) +
                     'Quality Solutions' + chr(13) + chr(10) +
                     'Technology Consulting';

DeptString 

But for some reason if the {@Dept_Array} has more than one value then the DeptString only shows the value that fulfills the if/else statement first. It won't show more than one department only the one that hits first. I need it to build a output string with all the values inside the {@Dept_Array}