Please make sure you have verified the email address on your account for full access to all of Lithium's Community functionalities. Accounts that are not verified will be limited in participation; they will not be able to post, reply, create a new idea, or blog post, among other things.
Verifying your email is pretty simple:
Click 'My Settings' in the top right nav bar
In the 'Personal Profile' tab, click 'Email'
It should look like this:
If it says 'Unverified' then you can confirm it from here, or if you get stuck just let JulieH know or email firstname.lastname@example.org and we will get it sorted out for you.