Switching from Personal to Enterprise Gateway

[Anonymous]

I've recently decided to switch from a personal to an enterprise gateway. One data source I've setup via the SQL server and I am able to choose it as my gateway connection which one would expect:

I have another SQL data source I set up and tested the connection and it says successful, however when going to the reports that would use this data source I am not able to select my enterprise gateway and had to revert back to using a personal gateway to have these reports refreshed:

If I've succesfully created this data source, why would I be unable to select it as an enterprise gateway?