Linking Excel to Project

Hi there, I’m an AIMMS newbee - needing it for a uni-project.
I’m having a lot of trouble connecting my Excel file to the AIMMS Project. When I try to run my procedures to read the data I’m getting an error: permission denied. Tried to insert the procedures in the Interface Setup in my Excel Add-In but am still not getting it right 
Any common fixes there for regular newbee-mistakes?