AT89C2051 Program

Hi Frnds
im doing a small project. Im a newbie. Ive done a program to toggle a bit with time delay. When i select 89S52 controller it works fine. But when i select 89C2051 it is only working in debugging mode and not with the hardware. In debugging mode when i look at the pheripherals only the port bits are getting enabled and disabled with the time delay and not the pin bits... Im using keil 4...

Thanks in Advance

Please post your code.

add pull up to that pin

Post your code for better help. Its hard to imagine the problem otherwise.

@ Gatzrulz
which controller pin you are using
there are two pins in AT89C2051 which need to attach a external pull up resistor
that pins are 11 and 12 pin of ic i think it is P1.0 and P1.1 which is also attached to
internal comparator of AT89C2051
post your code may be you are doing some mistake in the code