Now, I've found out what's the problem, in used theme.
It works with default theme. I use gramophone theme.

I turned on debugging, but it shows nothing when I want to send PM.

I used FF,IE,Safari, everywhere without success.

Man, what are you talking about?

Hi all,
I've just installed last version of XOOPS and enabled Classifields module, but I'm facing the problem where I can't use personal message (PM) within classifields module, neither raise "Recommend us" window at "Site info" block. It simply doesn't respond to a click. I get some kind of javascript error, see below:

Line: 1
Char: 1
Error: Object expected
Code: 0
URL:http://xxx.org/xoops/htdocs/modules/classifields


I also have a problem when I use internal editor to add the Advert, buttons and menus like [B][I][SIZE][FONT]{COLOR] doesn't react to a click, but when i modify the advert these edit features work normally.

I'm not sure, but I think all of these problems mentioned above are somehow related.

Has anybody experienced such problems already? Thanks for the help.