Freelance English teaching while on a student visa

Hello, I recently changed my residency permit as a freelance english teacher to a student visa. I discovered after the fact that as a student you're not allowed to do freelance work (as far as that's what it says in my new visa). Is there anyway around this? I would like to carry on teaching to support myself, eat and pay for shelter, and study at the same time, but these two things seem to not go together in Germany.

I'm a bit peeved about it. I told the bureaucrat responsible for this, at my most hated place on the earth (the German immigration office of Berlin), that I was still teaching and it's kinda obvious considering what my old visa was, yet it wasn't mentioned to me that it wouldn't be permitted with the new student visa (I only discovered it a couple of weeks later when I was showing a friend the new visa).

Cheers,
Michael

And did the Beamte provide any advice when you told them that?

I would think the best thing to do would be to just have the freelance residence permit, as I don't think that precludes your studying.

Is your new visa a short term or temporary student visa? I know that on my 12-month student visa I'm permitted to work up to 90 full days or 180 half days per year. It might be different for different nationalities, but I thought that was a universal rule...