This is the code I'm using, already rewrited it all over, cant find the problem, please, can correct it for me? Thanks.

TL EQU 07Ch ;Endereços das variaveis
TH EQU 07Dh
TS EQU 07Eh
V0 EQU 07Fh
V1 EQU 080h

;P3.4 <-->WR(to start convert analog - binary (0804)we must have WR 0->1)
;P3.5 <-->INTR (=0 to and convert)
;P3.3 <-->RD (RD 1->0 to read data from ADC)
;P2 <-->D0-D7 (out put)
;-----------------------------------------------------------;

START: MOV PCON,#0
MOV TMOD,#00100010B ;Set Timer1 Mode for 8bit autoreload (T1M1=1)
MOV TL1,#255 ;Set load/reload
MOV TH1,#255 ;
SETB TR1
MOV SCON,#01000010B
MOV P2,#255 ; to receive data from ADC
MOV P1,#00000000b ; Mux Input 0


READ0: MOV P1,#00000000b ; Mux Input 0
MOV TL,#255
MOV TH,#100
CALL DELAY
CLR P3.4 ; WR =0
SETB P3.4 ; dat WR = 1 to start convert
JB P3.5,$ ; wait to end convert
CLR P3.3 ; end convert and allow read data from ADC

MOV A,P2 ; read data onto A register
MOV P0,A
CLR C ; Adjust for midi send
RRC A ; Adjust for midi send
SETB P3.3 ; dat RD=1 for read next steps

CJNE A,V0,DIFF0
JMP READ1

DIFF0: MOV V0,A
JNB TI,$ ; If diff send midi
CLR TI
MOV SBUF,#0B0H ;Control Change Channel 0
JNB TI,$
CLR TI
MOV SBUF,#47 ;Controller Number
JNB TI,$
CLR TI
MOV SBUF,V0 ;Controller Value

JMP READ1


READ1: MOV P1,#00000001b ; Mux Input 1
MOV TL,#255
MOV TH,#100
CALL DELAY
CLR P3.4 ; WR =0
SETB P3.4 ; dat WR = 1 to start convert
JB P3.5,$ ; wait to end convert
CLR P3.3 ; end convert and allow read data from ADC

MOV A,P2 ; read data onto A register
;MOV P0,A
CLR C ; Adjust for midi send
RRC A ; Adjust for midi send
SETB P3.3 ; dat RD=1 for read next steps

CJNE A,V1,DIFF1
JMP READ0

DIFF1: MOV V1,A
JNB TI,$ ; If diff send midi
CLR TI
MOV SBUF,#0B0H ;Control Change Channel 0
JNB TI,$
CLR TI
MOV SBUF,#47 ;Controller Number
JNB TI,$
CLR TI
MOV SBUF,V1 ;Controller Value

JMP READ0



;------------------------------
Delay: DJNZ TL,$
MOV TL,#255
DJNZ TH,Delay
;MOV TH,#255
;DJNZ TS,DTL
RET


END