drush cron returns unrecoverable errorwhen elysia_cron is enabled

Hello,

Running "drush cron -d" I get "unrecoverable error".
The last three line interesting:
"WD access denied: kezdolap [0.84 sec, 37.23 MB] [warning]
Drush command terminated abnormally due to an unrecoverable error. [0.84 sec, 37.23 MB] [error]
WD cron: Cron run exceeded the time limit and was aborted. [0.84 sec, 37.24 MB] [warning]"

Any idea what causing the error?
Thanks in advance.

Full log:
Bootstrap to phase 0. [0.03 sec, 1.35 MB] [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drush() [0.03 sec, 1.49 MB] [bootstrap]
Bootstrap to phase 6. [0.07 sec, 3.38 MB] [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_root() [0.07 sec, 3.38 MB] [bootstrap]
Loading drushrc "/home/dev_site/public_html/drushrc.php" into "drupal" scope. [0.07 sec, 3.38 MB][bootstrap]
Initialized Drupal 6.20 root directory at /home/dev_site/public_html [0.09 sec, 4.03 MB] [notice]
Drush bootstrap phase : _drush_bootstrap_drupal_site() [0.1 sec, 4.04 MB] [bootstrap]
Initialized Drupal site www.myhomepage.com at sites/default [0.1 sec, 4.04 MB] [notice]
Drush bootstrap phase : _drush_bootstrap_drupal_configuration() [0.1 sec, 4.04 MB] [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_database() [0.11 sec, 4.07 MB] [bootstrap]
Successfully connected to the Drupal database. [0.11 sec, 4.07 MB] [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_full() [0.12 sec, 4.33 MB] [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_login() [0.63 sec, 27.83 MB] [bootstrap]
Successfully logged into Drupal as Anonymous (uid=0) [0.63 sec, 27.87 MB] [bootstrap]
Found command: core-cron (commandfile=core) [0.63 sec, 27.87 MB] [bootstrap]
Initializing drush commandfile: user [0.63 sec, 27.87 MB] [bootstrap]
WD boost: Expired stale files from static page cache. [0.82 sec, 36.41 MB] [notice]
WD access denied: kezdolap [0.84 sec, 37.23 MB] [warning]
Drush command terminated abnormally due to an unrecoverable error. [0.84 sec, 37.23 MB] [error]
WD cron: Cron run exceeded the time limit and was aborted. [0.84 sec, 37.24 MB] [warning]