Project management is 90% communication - I don't know who was the first to say that but it's 100% true. If you have severed communication at any level of your project (between you and your stakeholders, or between you and your team members), then most likely your project is doomed.
Whenever you have a communication breakdown you should immediately act to fix it. Usually communication breakdowns occur because of conflicts between two or more project participants or because of the laziness of one or more major project participants (such as the project sponsor or yourself). In the former case, you should do what you can to resolve the conflicts on your project (that's why conflict management is very important). In the latter case (laziness of a project participant), then you should talk to the person(s) causing this breakdown openly and ask him to change his behavior, as it's detrimental to the project. If that person is you, then you should ensure to address this habit (laziness) by performing all your tasks (especially communicating with stakeholders and the team members) in a timely fashion, or else you will find your career sharing the same fate as your project (e.g. doomed!).