I am maintaining a site on drupal 6. I have installed a birthday module which can send mails to users on their bday. But it doesnt do so. None of the other cron related tasks are done, though cron runs daily, and I do get a notification on mail . I tried to install a new module called ultimate cron (6.x-1.7), this could solve my problem earlier when I last installed it. But on re-installation this also doesnt work. None of the triggered rules that should be fired on cron run are fired.
On site config -> cron it lists all the processes, but they are in starting state. And on background process page , it shows first task with 0 progress n none other are being processed. I have tried to install latest version of ultimate cron modules, but that gives some error saying "Unknown field: start stamp". Please help me with this.