Can't use translation tools

When I was creating a rocket I used the transation tool, I simply selected it and I could'nt use it, it repeatdly sounded the translation sound and it didn't move the part (It was a strut attached radially into a surface)
Youtube video: *https://www.youtube.com/watch?v=AoYF6VkcDvE&feature=youtu.be

NOTE: The photo is not related to this bug.