I dont know, at this point what the problem is.
I dont see them via the web, dont see that semi-recent-comments/ directory via the web either. Short of seeing it via ftp myself, I cant really help.
If you have plesk or cpanel, I would take a look at your apache error log, see if youve gotten any 404's or other errors. Ive hit that site and those 2 files a lot so if there are errors, youll see them there.
You have a good deal of other issues going on with that site, btw, at least 2 mysql errors that I saw.
I will be interested to know how/if you resolve this, so please post back.
that sem-recent-comments/ that needs to be 755, btw. check that too :)