[Koha] Newbie Questions

Hi All Just managed to install Koha 3.02.00.004 on Ubuntu and I have the following questions: 1. When I try to create a new record fields 100a, 650a and 700a cannot be edited. They do not allow me to add any text into them because the curser won't even get in there. 2. When I importing a record using z39.50, after clicking the Save and view record button, I get the message "Tag "" is not a valid tag. at /usr/share/koha/lib/C4/Biblio.pm line 1863" Whats the problem here? Ephraim ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.