Hi Marcela, are you asking for a recommendation for what Service Pack to move uo to to resolve these problems?
If so SP 7 introduced a number of addition features that may help you achieve some of the things that you have been trying to do over the last few weeks and included fixes for problems up until that relase time.
I beileve SP 15 has additional features which are useful and some problem fixes ( I dont have the full details of the SP to hand)
I am currently running SP 12 and found it unbearable to run anything under SP 7 due to some problems and the limited functionality of DB & UI rules. Of course SP 12 comes with problems regarding Aces whch we can live with.
I strongly recommend upgrading at least to SP7. DB/UI rules where greatly enchaced in SP7. Going to SP14 or SP15 could cause trouble if you use "Opening hours", at least *I* had troubles with these version.
This page is quite big since it contains every enchacement. Use "Find" and type "Patch contents" to go about the bottom of the page. There all service packs are listed. Click on them to have more details.
You should look there in order to find what version solves your problems.
But I will repeat my recommendation to upgrade at least to SP7