How to upgrade 7.12 to 7.22

A long time ago, we bought the Netscape SuiteSpot, Unix edition and an Informix 7.12 version server and client came with it. These are not Y2K tested and the Netscape Enterprise Server 3.6sp2, which we had to install to make the webserver Y2K proof, needs to talk to the 7.22 client. Three questions: Does anybody have an idea if there exists an upgrade path to upgrade from 7.12 to 7.22 for both client and server? If we only update the client from 7.12 to 7.22, can it "talk" to the 7.12 server? (We NEED to update at least the client as the Netscape Enterprise Server demands that) Though both 7.12 client and server are not tested on Y2K compliancy officially, does anybody know the reaults for the 7.12 server? You would probably say "Why don't you upgrade the whole bunch to the newest versions?", but this is a waste of money for us as this system is phased out and a new system is being build in parallel with state of the art equipment. This system only needs to continue running for another 4-6 months and, too bad, then we crossed the 31-12-99 barrier (and the other possible tricky dates). As I'm not reading this group normally, can you please send a copy by e-mail as well? Regards, George