I tend to agree with DavidR with 1 more reason. Whenever I had a forced up program update go south, and tried to revert back to a previous version, as soon as the vps updated, the new program version came with it. Same problem.
After a couple of tries, I clued in to the fact that it wasn't the version that was a problem, but that the update failed.
Following the steps in DavidR post should resolve this.