Are you getting errors or warnings?
Right click on the project and go in Properties. On the left bar, go in the Flex Modules tab and check if your modules are present there.
If not, browse your modules from the project and add them one by one.
No, I am not getting any errors or messages...
I tried your suggestion. But it didnt help. I went to properties, Flex Modules...I tried to add a module by clicking the browse button but I could see only the current project. Can you tell me how to add a module to an application??