Well... somehow it is working now...
But only after windows restart;
i also started first win2k ( another partition ),
and checked cookies on w98 partition:
holy crap ! how is it possible there was 7 differnt cookie
.txt files, while i deleted all but one before on win98 ?
OK deleted them now from w2k, logged in w98,
stay logged in forum...
It's sad, i could not find an ultimative solution
( it should be easy and fast for users... )