this upload of yours has not yet been officially added to IMSLP. You need to:
2) Once you've done that, go to the composer page for Mark Yampolsky and click the link to Add a piece to this composer page
2a) Give a title such as "Technique of the violoncello" and fill in any info you know
3) Once you've done that, go to the page for "Technique of the violoncello (Yampolsky, Mark)" and click on the link to Add a file to this page
4) On the next page, select the link where it says Use this form for files already uploaded
5) On that page, the filename you uploaded was Yampolsky Mark Tecnica del violoncello.pdf. Please fill in the other info and click Submit!.
It's often easier when you add a score for a well-represented composer such as Bach, Mozart or Schubert, when nearly every work has already been uploaded in some form, so you don't need to go through steps 1) and 2).
If this work is by David Popper, then you should add this work also. Go over to the Popper page and check out whether there's already a page for that work. Currently the file you uploaded isn’t officially linked in, just like the file above.
By the way, in general you should not upload copyrighted material; if you’re unsure, you can post a question about it over at the forums.