The program must have been made for a 1756-L61 controller, or RSLogix 5000 would not give you that error.
You may be able to upgrade your RSLogix 5000 license from Mini to Standard, but you should consult with your Rockwell Automation distributor or local sales office about the particular policies and prices in your area.
Again, if this is a demo or sample program you may be able to convert it to a CompactLogix using community resources on the Forum.
If it's really a 1756 ControlLogix program, and you need to work with it, then you need one of the Editions of RSLogix 5000 that supports the 1756 series controllers.