Can you read over, and copy and paste the rule(s) you have broken from here? Attached with that response, I would like you to, in your own words, tell me why you think Modified Clients are against the rules.
If I am to lift your ban, I expect you at the bare minimum to be able to discern what may or may not be against the rules, and why they are, since if you are found to be breaking them again, it is highly unlikely that unawareness towards a rule will be accepted as a valid reason.