Another problem it's jquery conflict. I was waste alot of time before i could fix it before it's start working. As result just removed this plugin and find more stable accordion.
Thank you for your feedback.
Incorrect validation is caused by poor HTML code inside the accordion panel on our demo site. Accordion itself is 99% valid. 99 because sometimes the validation fails - accordion ID is generated on the fly and if the ID starts with digit number, validation just fails (bad random generator. I'm aware of it).
In regards to jQuery conflict, that's a common issue but in most of cases easily resolved (of course both of related competing jQuery scripts must be compatible each other).