The amount of Hive Power in your account determines your resource credits. You need resources to publish. They added this because spammers were creating new accounts and showering the blockchain with spam messages and phishing attempts.

Hiveblocks is a block chain explorer. This is your page.

https://hiveblocks.com/@wjbeaver

The page shows that your account has 0 HP, and you only have enough Resource Credits to write two comments. The RC regenerates in a 5 day period.

Sadly, this info is buried in the white paper and there is no way that a new user would know this.