Dont understand . " whats going on " with website

The website that I look after seems to have a number of Fault Messages . and a messed up design .

Click This LINK !

www.tameside-autism-community.org.uk

With This Fault Message

Warning: ini_set() has been disabled for security reasons in /home/tameside/public_html/inc/header.inc.php on line 155
Warning: ini_set() has been disabled for security reasons in /home/tameside/public_html/inc/classes/BxDolTemplate.php on line 7
Warning: Cannot modify header information - headers already sent by (output started at /home/tameside/public_html/inc/header.inc.php:155) in /home/tameside/public_html/inc/design.inc.php on line 101

I don't understand . How . to correct this issue . Please advise . If I could only get this website somewhat operational it'd be very supportive for people that are autistic in my local area and near areas .

Thankyou for pending help

I doinITameside Autism Community

[edit] Read this response from Deano... http://www.boonex.com/forums/topic/Multiple-Errors-on-Fresh-Install.htm

http://www.boonex.com/googlesearch/search?q=ini_set%28%29+has+been+disabled+for+security+reasons&gse_filter=googlesearch

first off, get in the admin menu, turn off all caching features, all of them.

manually clean/clear the cache leaving the three .htaccess files in /cache /cache_public and /tmp

So far for me, the cache is not working, then we can tackle your other problems.

Look under yoursite/administration/host_tools.php

see if your all green with OK's