This possibility increases exponentially with the complexity of the system and the lack of testing. Make sure help and support are available for students using the system. Start slowly and build. Don't try to initiate massive change for both students and yourself. Experiment with small pieces, see what works and what doesn't, and build on that experience.
People tend to take on too much and then fail and blame the technology.
Be ready to participate as much as or more than the students, especially in online discussion. Technology should not be used to distance yourself from students. So remember that technology provides you with a few more tools in your arsenal, but is not a magic bullet. Above all, keep in mind that it's the underlying design and approach you take to teaching and learning that will determine how effective your strategies are, not the technology you use.