Hey ibnjam,
Thanks for contacting National Instruments support. You need to have the 6052E in the last slot closest to the SCXI portion of the chassis. Also the chassis will not just show up in MAX you need to manually add the chassis and a dialog will appear that detects the modules in the chassis.
Let me know if you have any questions.
Regards,
Kenn North
Principal Product Manager - Search, Digital Analytics
http://ni.com/search