theme problem

[Guest]

hi, i have an app_themes folder in my app wand it works perfectly and so do
my themes when i run the app on my localhost. but when i put it online it
doesnt.
i get an error telling me that my theme wasnt found in the global or
application themes directory.
i think this is because the app lies in a subfolder, not at the root
directory of the site. and i dont have access to the root directory because
the owner of the webspace is only letting me use that particular diractory.
is there a way to access my themes and make the page run properly? thanks