Widgets

I am a “newbie” to WordPress.org. I have installed Plug-in “Add to Any” on my client’s blog on his website. Since this plug-in only offered to position the Add to Any buttons at the bottom of each post, I created a Text Widget in the right column and copied and pasted the codes for the Share and Subscribe buttons. Both buttons show up on the Blog page, but if you click on the Title of each individual blog post (which takes you to an individual page), the whole right column of the blog disappears – not just the buttons but every other widget item, eg. Pages, Links, Meta, etc. Does anyone know why this happens? Thank you in advance for any assistance…