I2c and At89c2051..... problem

HI, I have one problem in VSMproteus....
I used At89c2051 and 24c04a for simulation I2C and PFC8583 and I can't read I2C data byte from eeprom ... is steel 0 value ... but in log view I2C is data ok read....
I connect SCL-P3.0 and SDA-P3.1....

I2C_read:

SETB SDA
MOV b,#8
I2C_R: CALL I2C_wait ;(nop's sub)
SETB SCL
MOV C,SDA
CLR SCL
RLC A
DJNZ b,I2C_R
RET


in sda is not change bits.... how to read... whats wrong.... HELP!!!!

but, when I disconnect Clock pcf8583 from I2C bus , eeprom simulation is work ok... what up....

IIC_START MACRO
SETB SDA
SETB SCL
CLR SDA
CLR SCL
ENDM
IIC_STOP MACRO
CLR SDA
SETB SCL
SETB SDA
CLR SCL
ENDM
IIC_DT_0 MACRO
CLR SDA
SETB SCL
CLR SCL
ENDM
IIC_DT_1 MACRO
SETB SDA
SETB SCL
CLR SCL
ENDM
IIC_RD_BIT MACRO
SETB SDA
SETB SCL
CLR SCL
MOV C,SDA
ENDM
IIC_DV_ADDR MACRO
IIC_DT_1
IIC_DT_0
IIC_DT_1
IIC_DT_0
IIC_DT_0
IIC_DT_0
IIC_DT_0
ENDM

;------------------------------
IIC_READ:
IIC_START
IIC_DV_ADDR
IIC_DT_1
IIC_DT_1
MOV R2,#8
IIC_R_L1:
IIC_RD_BIT
RLC A
DJNZ R2,IIC_R_L1
MOV IIC_BUF,A
IIC_STOP
RET
;------------------------------
IIC_WR_ADDR:
IIC_START
IIC_DV_ADDR
IIC_DT_0
IIC_DT_1 ;ACK
MOV A,R7
MOV R2,#8
IIC_WA_L1:
RLC A
MOV SDA,C
SETB SCL
CLR SCL
DJNZ R2,IIC_WA_L1
IIC_DT_1 ;ACK
IIC_STOP
RET
;------------------------------
IIC_WRITE:
IIC_START
IIC_DV_ADDR
IIC_DT_0
IIC_DT_1 ;ACK
MOV A,R7
MOV R2,#8
IIC_W_L1:
RLC A
MOV SDA,C
SETB SCL
CLR SCL
DJNZ R2,IIC_W_L1
IIC_DT_1 ;ACK
MOV A,R6
MOV R2,#8
IIC_W_L2:
RLC A
MOV SDA,C
SETB SCL
CLR SCL
DJNZ R2,IIC_W_L2
IIC_DT_1 ;ACK
IIC_STOP
RET