Searching for Flickr posts

[thefergieferg1]

To avoid risk of reposts I try to search OCC for Flickr names or userid eg 12345678@N01.

The names can changed or be written incorrectly so the ID is better.
I've found that I unable to hit ID's that I know exist. I've even tried it without the @01 bit but no luck.
I'm aware of the issue of Flickr links but has the number search been disabled for some reason.
- Or I am I doing something wrong?

Thank you