Open the “My Transfers” window and check the column “status” for the file which is not being downloaded.
- Download is queued by me:
Make sure you have maximized the number of Downloads : Options > Traffic > Downloads/Total maximum=Max.
If you have an Ultimate licence, you’ll find more details here : I-can-only-download-one-file-at-a-time-even-though-i-am-an-ultimate-user/ - Download is queued by my contact:
Just wait until your download reaches the top of your contact upload list