oops,
sorry, you have not mentioned such purpose of the counter before. Why you translate return address with DPTR while it is static (constant) number and may be produced with compiler/linker? Just use:

; for Keil:
mov R_LO,#LOW(RETURN) 
mov R_HI,#HIGH(RETURN)
; or, at general:
mov R_LO,#(RETURN-(256*(RETURN/256)))
mov R_HI,#(RETURN/256)

cu