Modbus TCP

Hi,
Im having trouble sending modbus command over TCP from my arduino.
Can anyone assist me please! I am not using the Modbus library but rather trying to send the bytes array as char's. I am new to Modbus and not sure how to trouble shoot.
If it would help I can post my code here. I thank you

Is there a specific reason for not using the library?

If it would help I can post my code here.

It's all just guesswork if you don't, and as you haven't really defined your problem, they would be pretty poor guesses.

I'm very familiar with modbus having written several RS232 and TCP implementations. Can you supply more information, then I hope to be able to help.