hi,
oops, is it seems I do not understand? You said that LED is turning on and off with MCU (from port 2.0). Now you say that it is controlled with switch. Could you post the scheme then, please?
In case that you control LED via port pin and npn-transistor, increase base resistor up to 10k. Otherwise MCU output of the pin 2.0 will be overloaded and lock-ups with low current state which is not enough to open a transistor.

Regards,
Oleg