Is there a way to join the Army?

I worked with the British Army as an Interpreter for four years , I went to the recruitment centre in town as I wanted to join the Army, the officer said I wasn't eligible to do so as I'm not British citizen. I told him it's rediculous the MOD didn't bother to employ me in Iraq but it does here!!! I got indefinite leave to remain and have been resident in the UK for 2 years now please anyone know what to do as I love Army life. Thanks