Code completion (autocomplete) not working in wxDev-C++

Question

IDE

Actually a subject. How to turn it on is clear: go to Tools->Editor Options->Class Overview
, check the boxes there, all that. But nothing works!
At the first start, the IDE asked me if I needed to create a cache for autocommit, answered in the affirmative, after which I honestly waited a minute while the cache was being created. However, when writing the seemingly most trivial:

#include <iostream>
int main(){
    std::
}

After "::" or ".", or "->" nothing happens. If you put one of these tokens, and then press Ctrl + Space, nothing happens either. In the "class overview" I observed the cache - it is there, when the IDE is loaded, information also appears that the cache is being loaded.

What am I doing wrong?

Oh yes, I have Win 7, maybe that's the issue?