plan branch not listed in deployment project trigger configuration

[Timothy Clotworthy]

Hi. I have a new bamboo build plan. I added a single branch to the plan using the "Create plan branch" button on branches tab of plan configuration. The branch was automatically detected in the list of "Available VCS branches", so I did not need to create the plan branch manually.

Here is my problem: I attempted to create a trigger on a bamboo deployment project (based on "After successful build plan") that would use the plan branch above. However, the plan branch is not showing up in the listing under "Use a custom plan branch". I made sure that the plan branch was enabled, but that had no effect. I made sure the entire build plan was enabled, but that had no effect either. 

Any ideas or insights into what might be problem or what I am doing wrong would be greatly appreciated. Thank you.