Hi,
Are you on version 6.x or earlier. I tried using v6, but it was detected fine. its a simple object with the read - read text with OCR stage. attached results
there is a red gradient in the background, so that may cause problems, and I even expected it to get a few alphabets wrong because of that, but it seems to be fine.
Check if gets solved with v6, if you are on an earlier version, maybe you can try updating the tesseract pack.
regards
Ashish