[Plugin: WordPress Download Monitor] No file size.

I installed WP Download Monitor on the WPMU, but does not display the file size. On the “WP” plugin works ok but there was just updated.
There is no information about the file size, the tag {size} is obviously added.

WPMU 2.9.2
WP Download Monitor 3.3.3.10

http://wordpress.org/extend/plugins/download-monitor/