Installing WordPress Multisite

Hi,

I am having problems setting up a WordPress Multisite, I have been in touch with my hosting company (Heart Internet) who say it’s not a server issue. I have set up Multi sites before with no problem. On this occasion it doesn’t seem to set up properly. I thought it was because I was using a temporary URL, the main url is

http://cluster7286.extendcp.uk/silkysmoothbeauty.com/ which works fine, however the ‘multi sites dont, you can see them here, they have no styling and I can’t access the admin area

http://cluster7286.extendcp.uk/silkysmoothbeauty.com/ealing/
http://cluster7286.extendcp.uk/silkysmoothbeauty.com/fulham/

I get an error message when trying to access the admin area “cluster7286.extendcp.uk redirected you too many times.”

Can anyone help me?

Thanks

Allan