We are not affiliated with the operation of WordPress.com, so we cannot help you directly. But, carefully check both your username and password, they are case-sensitive. If that doesn’t work, please reply with the URL of your wordpress.com blog, and I will submit a support request for you.
For future reference, the official method of obtaining support for your WordPress.com blog is via the “Feedback” form in your blog’s admin interface.
Thanks for the reply.
To my understanding, both my username and password are in lower case. I double-checked both, and I still can’t log in to access the admin interface.
If you can submit a support request on my behalf, it would be appreciated. Here’s the URL:
http://dcthornton.wordpress.com/
I have sent the support request. They should be contacting you shortly.