DS1307 with 16f877

Hello friends !
I'm interfacing DS1307 RTC with 16f877 using I2C communication. RTC is acknowledging but data received is not correct .Please help me. Its urgent!!!
MY code is
//RTC program
void serial();
int data;
void ssp_ack();
unsigned char receive(unsigned char addr);
unsigned char parameter[15],tx;
void transformm();
void main()
{ //DS1307 INIT STARTS

delay_ms(20);
STATUS.RP0=1;
//INTCON=0xD0;
TRISC.F3=1; //chng
TRISC.F4=1; //chng
SSPSTAT=0x80;//CKE=0 and smp=1; chng
SSPADD=10;
STATUS.RP0=0;
SSPCON=0X2E; //SSPEN ENABLE, MODE=1000(8)

//WRITE CYCLE STARTS
STATUS.RP1=0;
STATUS.RP0=0;
PIR1.SSPIF=0;
STATUS.RP0=1;
SSPCON2.SEN=1;
STATUS.RP0=0;
ssp_ack();

SSPBUF=0xD0; //CONTROLIN
ssp_ack();
STATUS.RP0=0;
STATUS.RP1=0;
SSPBUF=0x00; //reg pointer
ssp_ack();
SSPBUF=0x06; //set seconds
ssp_ack();
SSPBUF=0x06; //set minutes
ssp_ack();
SSPBUF=0x06; //set hr
ssp_ack();
SSPBUF=0x06; //set day
ssp_ack();
SSPBUF=0x06; //set date
ssp_ack();
SSPBUF=0x06;
ssp_ack();
SSPBUF=0x06;
ssp_ack();
SSPCON2.PEN=1;//STOP bit transmit
while(!PIR1.SSPIF);
PIR1.SSPIF=0;
delay_ms(20);
receive(0);
parameter[0]=receive(0); //sec
parameter[1]=receive(1); //min
parameter[2]=receive(2); //hr
parameter[3]=receive(3); //day
parameter[4]=receive(4); //date
parameter[5]=receive(5); //month
parameter[6]=receive(6); //year
SSPCON2.ACKDT=1;//Set NACK value
SSPCON2.ACKEN=1;
SSPCON2.RCEN=1;
ssp_ack();
delay_ms(20);
transformm();
serial();
}

unsigned char receive(unsigned char addr)
{ unsigned char x;
a=2;
tx=0;
STATUS.RP1=0;
STATUS.RP0=0;
PIR1.SSPIF=0;
STATUS.RP0=1;
SSPCON2.RSEN=1; //start bit transmit
STATUS.RP0=0;
ssp_ack();
SSPBUF=0xD0; //CONTROLIN
ssp_ack();
STATUS.RP0=0;
STATUS.RP1=0;
SSPBUF=0x00; //reg pointer
ssp_ack();
STATUS.RP0=1;
SSPCON2.RSEN=1; //start bit transmit
STATUS.RP0=0;
ssp_ack();
SSPBUF=0xD1; //CONTROLOUT
ssp_ack();
STATUS.RP0=1;
SSPCON2.RCEN=1;
ssp_ack();
x=SSPBUF;
SSPCON2.PEN=1; //STOP bit transmit

while(!SSPIF);
PIR1.SSPIF=0;
return(x);
}
void ssp_ack()
{
while(!PIR1.SSPIF); //CHNG
//serial(a);
PIR1.SSPIF=0;
}
//serial comm.
void serial()
{ int i=0;
//TRISC=0x80;//SELECT TX(RC6) AS INPUT AND RX(RC7) AS OUTPUT
for(i=0;i<7;i++)
{
SPBRG=0x19;// 25 DECIMAL FOR 9600 BAUD RATE
delay_ms(10);
TXSTA.F2=1; //BRGH=1 HIGH SPEED
delay_ms(10);
TXSTA.F4=0;// ASYNCRONOUS TRANSMIT
delay_ms(10);
RCSTA.F7=1;// SPEN SERIAL PORT ENABLE
delay_ms(10);
INTCON=0x90;// DISABLE TRANSMIT INTERRUPTS
delay_ms(10);
TXSTA.F6=0;// DISABLE 9BIT TRANSMISSION
delay_ms(10);
TXSTA.F5=1; // TRANSMIT ENABLE
delay_ms(10);
TXSTA.F0=0;// 9TH BIT OF DATA
delay_ms(10);
TXREG=parameter;
while(TXSTA.F1==0);
delay_ms(10);

}
}

void transformm()
{ parameter[0] = ((parameter[0] & 0xF0) >> 4)*10 + (parameter[0] & 0x0F);
parameter[1] = ((parameter[1] & 0xF0) >> 4)*10 + (parameter[1] & 0x0F);
parameter[2] = ((parameter[2] & 0xF0) >> 4)*10 + (parameter[2] & 0x0F);
parameter[6] = ( parameter[6] & 0xC0) >> 6;
parameter[3] = ((parameter[3] & 0x30) >> 4)*10 + (parameter[3] & 0x0F);
parameter[5] = ((parameter[5] & 0x10) >> 4)*10 + (parameter[5] & 0x0F);
}