Proteus里数码管不亮怎么回事，急！！ 急！！ 急！！

#include
#include
#define uchar unsigned char
#define uint unsigned int

uchar code DSY_CODE[]=
{
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90

};

void DelayMS(uint x)
{
uchar t;
while(x--)
{
for(t=120;t>0;t--);
}
}

void main()
{
uchar k,m=0x80;
P0=0xff;
P2=0x00;
while(1)
{
for(k=0;k<8;k++)
{
m=_crol_(m,1);
P2=m;
P0=DSY_CODE[k+1];
DelayMS(3);
}
}
}