How can I get a key event conversion rate for a specific event?

[Aventuri]

I am having trouble in getting that.

I have a table with campaigns (dimension),  sessions, key events, key events conversion rate (metrics).
I need to know the session conversion rate of every campaign, for just one of the several key events, not for all.

I set a event name filter that filters for just that event but all i got is a "no data" table.

Please help!