data output

[MINHLE]

hi every one,
i have a problem of output PORTA and PORTB .... of pic 16f628 or 16f877...

1- circuit works well (reading form i2c_eeprom) on both ports separately (but not AT THE SAME TIME)
2- when cascade the 2 ports i.e. A and B ; the OUTPUT is only PORTA (or NEITHER PORT)

....
call reset ; reset 4017
PORTA = $55
PORTB = $2a
call clock ; clock 4017
....

thanks for some help,
regards,
Minh le