Workflow only works for me

I created a workflow.  the first action of the first step sends an email.  no conditions, just an email.  the workflow is triggered when an Item is created in a SharePoint list.  

When i create the item, the workflow works fine.  no problems.  All the steps run.

When other members of the team create the item, nothing.  No errors (that i can see), but the email is never sent, and no other actions in the workflow are taken.

This is the first workflow I've created, i could be missing something basic.

Any ideas?

thanks!