Did you configure crontab on your server? 

http://docs.elgg.org/wiki/Cron

Hi Ismayil. I hadn't, but I did so after reading your post.

I tried doing crontab -e with this file:

# Location of GET
 GET='/usr/bin/GET'
 
 # Location of your site (don't forget the trailing slash!)
 ELGG='http://www.example.com/'
 
 # The crontab
 @reboot $GET ${ELGG}cron/reboot/
 @minute $GET ${ELGG}cron/minute/
 @fiveminute $GET ${ELGG}cron/fiveminute/
 @hourly $GET ${ELGG}cron/hourly/
 @daily $GET ${ELGG}cron/daily/
 @weekly $GET ${ELGG}cron/weekly/
 @monthly $GET ${ELGG}cron/monthly/
 @yearly $GET ${ELGG}cron/yearly/

But that didn't work. I got "bad time specifier" messages. So I then changed the file to this:

# Location of GET
GET='/usr/bin/GET'

# Location of your site (don't forget the trailing slash!)
ELGG='http://www.example.com/'

# The crontab
@reboot $GET ${ELGG}cron/reboot/
* * * * * $GET ${ELGG}cron/minute/
*/5 * * * * $GET ${ELGG}cron/fiveminute/
0 * * * * $GET ${ELGG}cron/hourly/
0 0 * * * $GET ${ELGG}cron/daily/
0 0 * * Sat $GET ${ELGG}cron/weekly/
0 0 1 * * $GET ${ELGG}cron/monthly/
0 0 1 1 * $GET ${ELGG}cron/yearly/

But it's still not working.

I assume you have changed the location of your site. Do a google search, there are plenty of resources out there. If 'get' doesn't work, try wget or curl. I tend to use curl

you need to do that in Cpanel of your hosting account.. just need to enter

curl http://your_site.com/cron/daily like that

its as simple as that

I have the same problem. Is really necesary to configure crontab on my server?. For example Garbage collector work with plugin hook and it isn't necessary to use crontab on server. No? I try a lot of options whitout results.

Some servers don't support the @... shortcut, so just remove the @reboot and any remaining @ and this should work as expected :

# Location of GET
GET='/usr/bin/GET'

# Location of your site (don't forget the trailing slash!)
ELGG='http://www.example.com/'

# The crontab
* * * * * $GET ${ELGG}cron/minute/
*/5 * * * * $GET ${ELGG}cron/fiveminute/
0 * * * * $GET ${ELGG}cron/hourly/
0 0 * * * $GET ${ELGG}cron/daily/
0 0 * * Sat $GET ${ELGG}cron/weekly/
0 0 1 * * $GET ${ELGG}cron/monthly/
0 0 1 1 * $GET ${ELGG}cron/yearly/