Sync - Nothing to Do

I am totally perplexed...

I open BC2, and choose my session:

Folder Based
Criteria:
- Compare Timestamps
- Binary Comparison

Tools > Sync Options:
- Left Newer: Copy L to R
- Right Newer: Copy L to R
- Only on Left: Copy L to R
- Only on Right: Delete R
- Different: Copy L to R
- Same: Leave Alone

I click on Actions > Syncrhonzine Folders > Custom SYnc

Create EMpty Folders: Checked
Just Selection: Unchecked
Only affect visible files: Unchecked

Mirro Left to Right

Then it tells me there's nothing to do...

1.) Do I need to wait for the background compare to finish (we're talking about 10s of GBs)?
2.) Why is this not working?

[Chris]

Yes, if you want the Custom Sync command to sync based on binary comparison results, you'll need to wait for the background comparison to complete before using the Custom Sync command.