Hello
support is here or
support@photopost.com
You would need to place 2048 as the maximum allowed multimedia file in upload options and max filesize in usergroup options
Basically your php has max filesize set to 2M which is the default and since it is over that the upload is being dropped. Not much we can do since the error is PHP related.
If you set the limits then our software can know its over and report the upload is too big and user can go from there
Your other option if you have access is to edit the php.ini file and increase your max upload filesize