7 Segment count display on interrupt two pins when high.

I am facing problem when programming 89c51 using assembly language.According to following code controller counts only 4.please help me to correct the code when both the pins (P1.0 and P1.1)are high then pin (P1.7)should be high to count.

ORG 0
IA EQU P2.0
IB EQU P2.1
IC EQU P2.2
ID EQU P2.3
IN_1 EQU P1.0
IN_2 EQU P1.1
OUT EQU P1.7
MOV R0,#0
MOV P0,R0
MOV P1,R0
MOV P2,R0
MOV P3,R0
CLR A
AGAIN:JNB IN_1,AGAIN
JNB IN_2,AGAIN
SETB OUT
INC A
CJNE A,#1,N1
MOV P2,#00000001B ;1
CLR OUT
SJMP AGAIN
N1:CJNE A,#2,N2
MOV P2,#00000010B ;2
CLR OUT
SJMP AGAIN
N2:CJNE A,#3,N3
MOV P2,#00000010B ;3
CLR OUT
SJMP AGAIN
N3:CJNE A,#4,AGAIN
MOV P2,#00000100B ;4
CLR OUT
SJMP AGAIN
N4:CJNE A,#4,N5
MOV P2,#00000101B ;5
CLR OUT
SJMP AGAIN
N5:CJNE A,#5,N6
MOV P2,#00000110B ;6
CLR OUT
SJMP AGAIN
N6:CJNE A,#6,N7
MOV P2,#00000111B ;7
CLR OUT
SJMP AGAIN
N7:CJNE A,#7,N8
MOV P2,#00001000B ;8
CLR OUT
SJMP AGAIN
N8:CJNE A,#8,N9
MOV P2,#00001001B ;9
CLR OUT
SJMP AGAIN
N9:CJNE A,#9,AGAIN
MOV P2,#00000000B ;0
CLR OUT
SJMP AGAIN
END