Groupwise 5.5 patch

I need to bring my GroupWise 5.5 server patches up to date. I understand I need to first install the netware patch SP6A for the Netware 5.0 part and then patch Groupwise 5.5. Since I have no patches on my Groupwise server, which patch do I need to install? Do I need the enhancement patch?

Ever since daylight savings time switch my email messages are an hour behind and I get that “Formating addressbook” message every time I log into GroupWise. I believe the latest patch will fix these problems.

thanks,
Rob