[Plugin: MultiPress Autoblogging plugin] Would not load

Plugin did not install on my WP blog, error:

Fatal error: Incompatible file format: The encoded file has format major ID 3, whereas the Optimizer expects 1; The encoded file was probably encoded by the Zend Encoder for PHP 5 (zendenc5), and therefore cannot be run on PHP 4 in blah blah blah line 0

http://wordpress.org/extend/plugins/multipress-content/