How can I use my SE OpenID to log into other sites?

Question

I want to post a comment at someone's blog. The author doesn't allow anonymous commenting. I am offered the opportunity to log in using OpenID. Supposedly, as a StackExchange user, I have an OpenID. But I can't figure out how to use it to log in for the purposes of leaving a comment.

I found https://openid.stackexchange.com/ but that didn't help.

Here's what it looks like when I try to log in at the blog:

The blog is hosted at livejournal.

I filled out the form, and put aparente001.myopenid.com in the first box that presented itself. (I got this idea from http://openid.net/start-using-your-openid/.) Then another box presented itself, with help text to put in a url, so I put in https://openid.stackexchange.com (as advised at https://openid.stackexchange.com). Here's the error message I got:

Cannot Complete Login

Detected an attempt to send an assertion when the identifier (https://openid.stackexchange.com/) is not owned by the logged in user.

Update:

I have attempted to follow the helpful instructions kindly provided by @journeymangeek. I went to the Stack Exchange OpenID page, and clicked on "Use your own URL to log in". I copied the link provided on the second line, as Journeyman showed in the screenshot (the code that starts with https://openid.stackexchange.com/user/). I filled out the comment form at livejournal. A step or two later, my openid.stackexchange.com/user/etc code was auto-entered into a key input box. It was rejected as not being a link, so I inserted https:// in the beginning. The submission did not get stuck; but I got a new error message:

naive_verify_failed_network: Could not contact ID provider to verify response.

Is this a problem at SE, OpenID, or livejournal? Is there anything I can do about it?

Answer 1

The link they have given is wrong

You'll need to retrive the openid url for your account from the Stack Exchange OpenID page.

Login, check your profile page, and click on the link "Use your own URL to log in".

It'll give you a bit of HTML code

You need to copy the link on the second line

Paste that in as the openid URL and it should ask for permission to use those credentials to log in (That's as far as I went for ranty reasons, but it certainly should work after that)

_{(This is nearly identical to the process of adding or readding SE openID to your own account, so keen readers would notice the instructions are very similar to this post)}