I would give you a bad note just because of that sausage-like code...

anyway...

you said "The program I wrote works for the first 10 locations only. It's got me very frusterated and any help would be appreciated. "

your code:
...
...
MOVC A,@A+DPTR
MOV DPTR, #2009H
MOVX @ DPTR,A
MOV DPTR, #000AH
CLR A
MOVC A,@A+DPTR
MOV DPTR, #2010H
...
...

in hexadecimal what comes after a 9 is a A, not a 10