There is an arrow symbol on each folder?

I have installed gnuhealth_Tryton. in the trytond-6.0.28/tryton/modules…there is an arrow symbol on each folder?..when i run the server, it show me dependencies error.plz guide me in good way…it will be more better for me to that somebody understand me step by step

That means incompatible modules are installed.

The GnuHealth team did a tremendous job on documenting how to install GnuHealth. Check out their documentation at GNU Health/Installation - Wikibooks, open books for an open world. When following that carefully you should be able to get it all up-and-running.