Error after changing directory

Hello,

I had WP 3.1 working fine on my site. It was placed on https://www.caae.cl/wordpress because I was testing a new site.
Once it was totally working, I move it to https://www.caae.cl , making the change on the WP options.

After doing a lot of research, I found out that there was a plugin causing conflict. So I deactivated throught SQL all the plugins. The site when back, but when I activate one of these plugins (Slickr Flickr, Facebook Comments for WordPress or Google Calendar Events) it throws me a PHP error.
On two of them, they won’t activate because of php error. And when I activate the Slickr Flickr it won’t show the entire site (error is:
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /home/th000862/public_html/wp-content/plugins/slickr-flickr/slickr-flickr-feed.php on line 27 )

What can I do? I installed a plugin for fixing permalinks and etc., but didn’t worked. The worst thing is that I NEED these plugins and the site has to be working now.
Of course I’ve installed and unistalled all of these plugins, but nothing seems to work.

What can I do?

Thanks,