[Need Help] Troubles with attachments and posting messages on people's profiles

Hey, I just found this great webpage. I've been a Zelda fan since I was two years old and I spend hours every day writing fanfiction. Now, I'm having some trouble with some basics functions here.

I can't attach files. I found out about a week ago, but then forgot about it. I get this message when I try to upload a file (tried multiple files that all meets the requirements):
wordart.gif:
Upload of file failed.

And just recently I tried to post a message on McCloud's profile page, but nothing happened. I tried again, I got the "Sending Message" thing, but no message appeared.

Thanks, zelda_master94

Edit: Runnin' opera 9.5 on XP