CULA Free Problem

I just recently installed free version of CULA R18 on my laptop running win 8.1 with matlab R2014b and CUDA 6.5. I'm starting matlab with provided matlab_cula.bat file but when solving equation following error is prompted
Error using \
BLAS loading error:
cula_lapack_link.dll: The specified module could not be found.
CULA bin path is added to both PATH system variable and matlab path.
what should I do?
thanks
Error using \
BLAS loading error:
cula_lapack_link.dll: The specified module could not be found.
CULA bin path is added to both PATH system variable and matlab path.
what should I do?
thanks