New install error session has already been started (1 reply)

Hi I have been trying to install piwik, I tried using cpanel the install appeard to go through fine but when I click on the admin link I got the following error

Error: Unable to start session. Please check that the web server has enough permission to write to these files/directories:
For example, on a Linux server if your Apache httpd user is www-data, you can try to execute:
chown -R www-data:www-data /home/****/public_html/analytics/tmp/sessions/
chmod -R 0755 /home/****/public_html/analytics/tmp/sessions/
Debug: the original error was
session has already been started by session.auto-start or session_start()

My host said it was the php version and changed it to be 5.1, this allowed me to login but then gave me a load of errors on the dashboard!!

it also showed a box saying I should be using version 5.4 so I changed the php version to 5.4 and now I get the same error as before?

any suggestions I have set folders to 0777 incl the tmp/* folders

thanks

M