Most probably, your inlinkz code has been modified for some reason.
Grab a fresh copy and replace the one you have in your blog. No links will be harmed in the process.
Just go to your dashboard:
then look for the linkup and click on the "get script" button
and select from the pull down menus:
2. new widget (we'll try this first in case the script you have in your blog is somewhat modified)
copy it and replace the code you have in your blog (no worries, it will not harm any of the links)