Denoise AI 3.7.0 plugin with CS6 sometimes fails

I have configured AI denoise 3.7.0 as per instructions for a plug-in with CS6. Sometimes it works fine but other times it comes up with ‘plug-in failure’ message and throws me right out of CS6, I try again and it will eventually work but it could take three or four attempts - other times it works fine at the first attempt. Anyone have any ideas about making it more stable.