always syncing

Hi there… doesn’t look like anyone takes any notice of this forum, but basically I haven’t had any majopr problems with emClient until recently (the last few months)… it just won’t let me send any emails with large attachments… even as little as 744KB - it just keeps syncing out before it sends, even after I’ve set all the options to Never Sync, the sending message bar gets 3/4 of the way there, and then the Last Synced message comes up, leaving the message in my outbox. Seriously disappointed…