svn externals not adding all files

Question

We have an external app_code folder shared among multiple projects. I have noticed that when I do an svn update using tortoise svn that not all the files within the folder get added to my app_code working folder. If I delete the whole folder and do an update all files are added. This happens on all folders that are external. Any help on how to work around this problem would be great. We have quite a few files in this folder and it is a pain to have to delete it everytime we want to get newer files.

External definition:
app_code http://yversion/repos/app_code/Trunk
app_controls http://yversion/repos/app_controls/Trunk
app_themes http://yversion/repos/app_themes/Trunk
bin http://yversion/repos/bin/Trunk
pagesMaster http://yversion/repos/Masterpages/Trunk
App_WebReferences http://yversion/repos/App_WebReferences/Trunk

Thanks
Royal

Answer 1

Make sure that all your repositories have different uuids.

Answer 2

Old question, but just in case anybody comes across it in a search, I was able to resolve this by running 'svn cleanup' on the root folder of the project.