octet string/substring match problems

[Klaydios Kontis <Klaudios.Kontis@eurodyn.com>]

hi. i am trying to upgrade my ldap from 2.0.xxx to 2.2.15. in the 2.0 
version u could do  ignoreCaseMatch/ignoreCaseSubstringMatch on octet 
strings ( synt as *.40 ). in 2.2.15  using 
octetStringMatch/octetStringSubstringsMatch is mandatory.
the problem is that I cannot do case ignore matches in 2.2.15 as i can 
in 2.0.23 on this octet-defined data; case-dependent matching works 
perfectly well though.
i looked the definitions of the octetString/SubstringMatch functions and 
changed them, making both 'to-compare' strings lowercase but the problem 
is not there.  lately i think that i should look at the way the 
searching is performed in the octetS* case.
so, since this is my first experience with ldap and i think i am in a 
dead end, can someone please give me a hint or explain what can i do? am 
i missing something here: is there supposed to be an octet-str-match 
which is case-ignore? thank u very much a-priori.