Plugin works in 2015, but not 2014

The plugin I have been working on works in sketchup 2015, but not in 2014. What are the differences in the api and sdk bewteen 2015 and 2014? The plugin loads and appears in the plugins menu, but the buttons on my toolbar lack functionality.

I read the release notes, but I am not using anything that is new from 2014 to 2015.

on Windows, in 2015, you have a 64 bit or 32 bit, which have you used?

I used the 64 bit on windows

v2014 is only 32 bit…
as you use the sdk, you need to compile for that separately…

Ok. Thank you for your help!

And that’s also needed for the 32bit version of 2015 - some people use that for compatibility reasons.