Source from external Folder (linked Source) not appearing in Flex ?

Question

i have a Air Project in which i have added three extenal source folders. but when i reopen project or strat flash builder again i get icon on those folder like this

but when i open the configuration for that project and try to validate the path and adding it again i get message like this

but the path is valid. proof is this pic

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what could be possible error,,, is there any way that i when ever re-open project i get no warning and able to navigate through the linked source code. now i am doing it 1- deleting on of the linked folder 2- again adding that folder.

Answer 1

as for quick:

1. install flas builder 4.1

   2.imort that project into workspace

3rd is using maven ;)

Answer 2

check your project files,

.actionScriptProperties

.flexProperties

.project

make all of them writeable. this issue occur when you get code from Visual Source Safe that the files are copied to local machine in read-only mode.