I/O Ports & SPI bus on c8051f120

Hello,
I've configured SPI bus on P0.2 (SCLK), P0.3(MISO), P0.4 (MOSI) and P0.5 (NSS) but on these ports: no signal. Normaly, I should have SPI clock at least but I have nothing.

I've configured :

1) Pins:

sbit SPI_SCLK=P0^2;     // SPI clock on P0.2
sbit SPI_MISO=P0^3;     // Master In/Slave Out on P0.3
sbit SPI_MOSI=P0^4;     // Master Out/Slave In on P0.4
sbit SPI_NSS=P0^5;      // Slave Select on P0.5

2) Ports:

void port_init (void)
{
         char sfrpage_save = SFRPAGE;     // Save current page of SFR

     SFRPAGE = CONFIG_PAGE;           // Load config_page

         WDTCN = 0xde;
         WDTCN = 0xad;                    // Disable watchdog timer

     XBR0 = 0x02;          // Enable SPI bus
     XBR1 = 0x00;          // Enable /INT0 and /INT1
     XBR2 = 0x40;          // Enable Crossbar and weak pull-up

         P0MDOUT |= 0x3C;          // P0.5, P0.4, P0.3 and P0.2 are outputs (for SPI datas)
         P0 = 0x3C;

     SFRPAGE = sfrpage_save;          // Restore SFR page
}

3) SPI bus:

void config_SPI (void)
{
     char sfrpage_save = SFRPAGE;     // Save current SFR page

     SFRPAGE = SPI0_PAGE;             // Load SPI page

     SPI0CFG |= 0x40;                 // Master Mode Enable
     SPI0CN  |= 0x8D;                 // Slave select and enable SPI
     SPI0CKR  = 0x01;                 // SYSCLK/2

     SFRPAGE = sfrpage_save;          // Restore SFR page

}

I have tried many times to resolve the problem but without satisfaction for the moment.

If you can help me, make it please.
Thanks.

Manu