[Koha] Problems with Hold in Koha 3.4

I am a very new user of Koha - and we are about to go live - we are a single library, no branches. I had been using 3.2.successfully in a trial situation and decided to upgrade to 3.4.2 before going live. However, when we try to place holds we get the following 'None of these items can normally be put on hold for this patron Place hold?' Clicking OK will place the hold This occurs for all item types and all borrowers. Using the OPAC to place holds does not work. Has anyone else had this problem? Hoping for an answer Moyra Moyra McAllister Melbourne Athenaeum Library Mob: 0409463663 email: moyrab@internode.on.net