Oracle : case sensitive objects on windows

hi everyone

We have a Linux server and ORACLE database installed, when we was testing our app we saw that any object in database, throught some SQL Query, its can't be found. then I figure out that all the objects (tables,views,procedures) are uppercase and there was the problem.

When We tested on windows I had not any problems.

Here we are seeing to replicate it on windows.
any idea as I can set up Oracle on windows and it is able to use case sensitive in objects of database.

any helps, thanks in advance