Shamim's Plugins

Thank you for contacting.
Can you please check Dashboard > Front End PM > Settings > Recipient and see if “Can users send message to other users.” checked?

please check now.

I have done some changes to this plugin. Now check.
Please do not update this plugin. If you update then this changes will be gone.
Also your website missing footer area, so most of the plugin which add script in your website will not work. You may not understand this now, but that missing footer area will have very strong impact in your website. It is a wordpress requirement that every theme must have header and footer (it is not visual header and footer, but some code). So your theme may have but may some poorly coded plugin may remove that.

Sorry for late reply.
Did you change anything after i made change to your website?

Did you set time “Announcement sending Interval in minutes.” and “Announcement emails send per interval.”? How much the value? Did you wait that much time? Do your website have visitor? Do your website cron works perfectly?

Please check now.

Thank you.
It seems there is a conflict with your theme.
If you can give me your theme i can further test and try to find a way to fix it.