does it mean function ok or not ?

It's more functional..

more functional? still dont get it~~~ so its almost dysfunctional?

dysfunctional means not operating normally or properly. How did you get "more functional" to mean less functional..?

now i see.....i thought at first the words more functinal mean more close to functional....which i suspect it on the edge...

thanks.

If you mean "ein funktionstüchtiger XXX" then it just means that it's functional. When you only write "funktionstüchtiger" then you have a comparative degree of the adjective "funktionstüchtig", that's why vwild wrote "more functional".