I just wanted to be sure 🙂
Try your app with this key (I use it, and I don't have any problems with Bing maps):
AqTGBsziZHIJYYxgivLBf0hVdrAk9mWO5cQcb8Yux8sW5M8c8opEC2lZqKR1ZZXf
Does the AddBingMap sample work for you with your key, respectively with this key?