ChimpExpress Won't let me work on anything

hugofreak wrote: So here is the deal I have wordpress Version 3.5 selfhosted install on my server and when I try to compose it wont let me. here I attached an Screenshot of how it looks like. so you can have an Idea of what is going on

if you see on the bottom there is a Warning... what is that all about? weird uh?
Warning: Missing argument 2 for wpdb::prepare(), called in /site/user/directory/wp-content/plugins/chimpexpress/compose.php on line 621 and defined in /site/user/directory/wp-includes/wp-db.php on line 990
please help me on this!