Word plugin - Macro cannot be found

I am using microsoft word 2010 and recently installed the mendeley reference manager plugin. The mendeley toolbar is there, but whenever I try to insert a citation (or hit another button) I get an error message saying: "Macro cannot be found or is disabled due to your security settings". I followed the help instructions word gave me (options -- trust center -- settings trust center -- enable all macros), but this did not help. I also double checked whether the plugin was listed as active in my word plugins, which it was. I have always worked with reference manager 11 which is still enabled (and working) in my word documents, but now I'm wondering whether the two might not be compatible. Hope you can help me!