[Koha] Version 2.2.9 problems

Hi I have installed Koha 2.2.9 on windows XP. I am experiencing the following problems. (i) When i change the login user name and password from the default, Both OPAC and INTRANET crash. (ii) In biblio-framework structure, when edit subfields KOHA crashes. I also cannot see the option for disabling marc tags, only edit and delete options are visible . (iii) Does the above version come with sample MARC records? Any solutions? Thanks.