Forum Style/update problems

[محروم.كوم]

Hi,
I have recently had to move hosts due to my previous one going bust, all I had was a two week old back, on my new host I was advised to use the 'upgrade' facility to get back up and running. Indeed this did work, but now when I try and alter the CSS file it tells me "This CSS file is obsolete and is available here for reference purposes only." so how do I go about changing anything? Ditto when I have tryed uploading a new 4.0 style it doesn't show any of the images. To be frank it's driving me insane! Can anyone help - I am sat here literally losing the will to live. I have two years work put into this and am sat here with a forum which I can't seemingly alter a single thing on. Going to be now as 12 hours straight of running into a wall is enough for anyone. I am having to think of switching to phpBB as I am getting that desparate. I've been on the net for 10 years and never ever experienced pain like this! All help much appreciated __DEFINE_LIKE_SHARE__