The fact that you cannot run the Capital IQ Addin together with the empower Addin is unfortunately a known problem.
Since the S&P CIQ Addin has integrated empower and the same Addin ID is used during registration, the Addins overwrite each other and only one of the two can run at a time.
This is because either the CIQ or the empower Add-In claims the LoadBehaviour for itself.
This means that you have to choose one of the two add-ins that you want to run, but you can switch at any time.
Do you still have questions?
If you have further questions, please do not hesitate to contact us.