Hmm, the weird thing is, it doesn't show any links -- at all. I did see the another topic, but I thought it doesn't explain my situation well... perhaps I'll just paste what I got back there:
Domain mapping is available for 10 credits per domain per year, registration not included. You have 0 credits. You will have to purchase additional credits via PayPal. Note that some forms of payment (eChecks) may take several days to process.
Possible problem with xaliber.net
We were unable to verify that general.xaliber.net is pointing to WordPress.com. If you own this domain, follow the directions below to get it ready for your blog. If you don’t own it, try a different name to see if something else is available. If the domain is available, you may be able to register it with another registrar and then map it to your blog.
How to fix it
You must make some changes to your domain before we can continue. (Sorry about the technical jargon!) The preferred method is to use the tools provided by your registrar to add a CNAME record. It should look like this:
general 14400 IN CNAME deathlock.wordpress.com.
Each registrar has its own method of adding CNAME records. The important parts of this record are your subdomain ("general") and your original blog domain ("deathlock.wordpress.com").
(If you have already done this it may take several hours for the changes to be recognized here. Please try again in a little while.)
If all else fails
If you need help, or if your registrar recommends a different solution, please contact support via the Help link at the top right of this page. We will help you sort it out.
While in the other hand, when I contacted my host provider, they asked me to get WordPress CNAME first. That... confuses me.