CANbus

[zx81sp]

Well, I've connected the board to a PC using a CANUSB adapter listening at 100Kbps, but does not receive anything. This is the code (18F258+MCP2510 20Mhz):

define OSC 20

TRISB = %000001000 'portb.2 output, portb.3 input
CANCON = $80 'configuration mode 
'Set Data Rate based on 20Mhz to get 100 kbs:
BRGCON1 = $04 
BRGCON2 = $BF 
BRGCON3 = $02 

CIOCON = $10
TXB0SIDH = $0 
TXB0SIDL = $1 
CANCON = $0 'normal mode 

'
' Program
'
Main: 
        TXB0DLC = 8 
        TXB0D0 = 65
        TXB0D1 = 66
        TXB0D2 = 67
        TXB0D3 = 68
        TXB0D4 = 69
        TXB0D5 = 70
        TXB0D6 = 71
        TXB0D7 = 72
        TXB0CON = 8
    pause 1000
Goto main
End

What's wrong?