I'm not sure if you've seen the transcript of our recent Q&A on ESA: http://bit.ly/P7yyfQ
and our information sheet: http://bit.ly/KlX4IB
Both help to explain the criteria for assessing ESA. These seems increasingly challenging to meet. People with Parkinson's often have difficulty explaining that their condition fluctuates.
After you take a look at these, do give a ring the the benefits adviser, Stephen on our helpline at 0808 800 0303 to see if he can help.
I wish you the best on your appeal.
PS: I've removed your extra 'l'.