A quick fix is to find your SalesWings tag in your Google Tag Manager environment, then:
1) Click on the tag you created
2) Advanced Settings
3) Under Tag sequencing, select "Fire a tag before Custom event Tag fires"
4) Then select under setup Tag your SalesWings tracking script
You're all set! If you still don't see the tag firing, please contact us at firstname.lastname@example.org, we'll be happy to help :)