STM3210C-eval - I2C Busy Flag Problem

hello.
I want to write byte to the sensör with I2C so write this code :

void MPU6050_I2C_Init()
{
        // RCC Configuration
        RCC_HCLKConfig(RCC_SYSCLK_Div2);
        RCC_PCLK1Config(RCC_HCLK_Div1);
        RCC_PCLK2Config(RCC_HCLK_Div1);
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

        // GPIO Configuration

        GPIO_Config_Anahtari.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
        GPIO_Config_Anahtari.GPIO_Mode = GPIO_Mode_AF_OD;
        GPIO_Config_Anahtari.GPIO_Speed = GPIO_Speed_2MHz;
        GPIO_Init(GPIOB,&GPIO_Config_Anahtari);
        GPIO_PinRemapConfig(GPIO_Remap_I2C1,ENABLE);

        // I2C Configuration

        I2C_Config_Anahtari.I2C_Mode = I2C_Mode_I2C;
        I2C_Config_Anahtari.I2C_ClockSpeed = 400000;
        I2C_Config_Anahtari.I2C_DutyCycle = I2C_DutyCycle_2;

        I2C_Config_Anahtari.I2C_Ack = ENABLE;
        I2C_Config_Anahtari.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_Config_Anahtari.I2C_OwnAddress1 = 0x10;
        I2C_Init(I2C1,&I2C_Config_Anahtari);
        I2C_Cmd(I2C1,ENABLE);
}

void I2C_MonitorAndClear_ADDR()
{
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_ADDR)==RESET);
        I2C_ReadRegister(I2C1,I2C_Register_SR1);
        I2C_ReadRegister(I2C1,I2C_Register_SR2);
}

void I2C_Clear_SB_Monitor_MSL()
{
        I2C_ReadRegister(I2C1,I2C_Register_SR1);
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_MSL)==RESET);
}


void MPU6050_SingleByte_Write(uint8_t register_address,uint8_t data)
{
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY)==SET);
        I2C_GenerateSTART(I2C1,ENABLE);
        I2C_Clear_SB_Monitor_MSL();
        I2C_Send7bitAddress(I2C1,MPU6050_Default_Address,I2C_Direction_Transmitter);
        I2C_MonitorAndClear_ADDR();
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_TRA)==RESET);
        I2C_SendData(I2C1,register_address);
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_TXE)==RESET);
        I2C_SendData(I2C1,data);
        while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BTF)==RESET);
        I2C_GenerateSTOP(I2C1,ENABLE);
}

here is my functions . In RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE); line , BUSY flag is set and never reset. So code hangs in here. When I reset the I2C1 periph clock with RCC_APB2PeriphResetCmd command , busy flag is reset but I can't configure the I2C interface after reset cmd. So what is the problem ?

thanks for your answer.