I am use to successfully installing wordpress blogs at cpanel and installed wordpress blog first time from Plesk control panel. I did not download wordpress and upload manually. I installed wordpress automatically from Plesk applications area. Please visit blog dot click x sense dot com and see the error.
It's not clear where the installation really is, If it's at http://blog.clicksense.com/ It's likley there's folders/files with the incorrect permissions. Try setting all the permissions directories-755 files-644 and see if there's a change. Also, plesk is somewhat flaky compared to WHM as far as configuring subdomains goes.