File activation in VS2008 plugin not working

Is there some trick to this that I'm missing? I'm able to login to TC from the plugin just fine, but neither changes nor test results are activating in the IDE when I click the appropriate links in TC. The plugin log says [sanitized]:


2009-06-11 12:54:17,247[  5408].INFO  Activation - Activate: RequestData: path=/test[buildId=833, testId=704, type=sln2008, noCache=1244739257242, server=http://tcserv:8099, ]
2009-06-11 12:54:17,247[  5408].INFO  Activation - Activate: RequestData: path=/test[buildId=833, testId=704, type=sln2008, noCache=1244739257242, server=http://tcserv:8099, ]
2009-06-11 12:54:17,968[traces].INFO  Activation - Nothing to be opened for test activation.
2009-06-11 12:57:04,338[  5408].INFO  Activation - Activate: RequestData: path=/file[file=proj/file.cs, project=, noCache=1244739424334, server=http://tcserv:8099, ]
2009-06-11 12:57:04,448[  5408].INFO  Activation - Item proj/file.cs found. Activating
2009-06-11 12:57:04,449[  5408].INFO  Activation - Activate: RequestData: path=/file[file=proj/file.cs, project=, noCache=1244739424334, server=http://tcserv:8099, ]