RewriteRule htacces, what's wrong?

Question

URL Handling

There is like this:
http://site.ru/index.php?page=fundblok
It is necessary like this:
http://site.ru/fundblok.htm
I do this:

RewriteRule ^([^/\.]+)/?.htm$ ./index.php?page=$1 [QSA]

This doesn't work either:
RewriteRule ^(.*)/?.htm$ /index.php?page=$1 [QSA]
One person advised me to switch hosting from Windows to Unix, could this be the reason? I do not understand...