Need help to handle a bug

[saeedparvar]

To whom it may concern.
I am developing a CFD code which was paralleled via MPI. I am adding 
OpenMp to make it a hybrid parallel code.
I am using Gfortan (GCC version 4.4.7) right now.
The first thing that I noticed is the code blocks when a subroutine 
,which has a loop inside itself with index variable such as I,J for 
example, is called from a loop which has the same index variable(counter 
I,J) of that subroutine. When I disable OMP command of just those 
subroutine everything is fine and the code works well.
Do you have any remedy for it?
I tried to use some update version such as GCC 4.7.2 and even 5.2.1, but 
the condition exacerbated as the code block in early stage in comparison 
with previous situation even if disabling those OMP commands.
I was wondering if you could kindly offer a solution to fix this 
problem.
Best regards
-- 
Saeed Parvar
Researcher
Department of Mechanical Engineering
Faculty of Engineering (FEUP)
University of Porto