I received this e-mail message 2 months after the add was posted, why?

Dear User,
Unfortunately, your listing #256 - K100 & K75 Manual has to be removed from our listing because your listing does not meet with our listing rules. If you have any question regarding with this issue, please contact us.

There was a clear picture of a Haynes K-bike Manual for sale and a small description.

I want to know why it was rejected?