Tried Maya 2014 License was not obtained

Hi,
I try to run Maya 2014 on my MAC and I have this error when I try to license the program. Maya 2011 and 2013 worked just fine and both like this one are licensed for Educational purpose. I don’t know what to do next so can anyone help me please to fix this error ? How can I license Maya 2014 properly ?
Thank you !

License was not obtained
Tried Maya 2014 (65F 2014.0.0.F), error 41
License method:
Environment variable
MAYA_LICENSE_METHOD=’standalone’
Product choice:
Environment variable
MAYA_LICENSE=’unlimited’
License file override: environment variable MAYA_ALT_EN is not set
OK
