arduino uno code vs arduino mega code

Projects General Guidance
1

I'm not sure where to post this, but here goes ...

I have a code about udp send and receive data and it works perfectly on Arduino Uno and ethernet shield. It receives and transmits data from udp. But same code doesn't work on Arduino Mega and ethernet shield. What should I do ?

2

What should I do ?

Fix it. If you need help, POST YOUR CODE!

3

Check that you're using the correct SPI pins.