Please make sure you have verified the email address on your account for full access to all of Lithosphere's 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.