i cant work out whats wrong and dont know how to start again can someone please help
Im sorry for what happened with your blog. Maybe it was hacked or something. You should have made some backing up.
Went to your blog, seems like you have re-installed. If you have backup, you can restore it by reloading the database.
maybe you change something.. do you have a backup of your blog?
i dont know what the last thing i did was, i thoink one minute it worked and the next minute it didnt. should i just re install wordpress?
well, what was the last thing you did before it crashed? Also, which WP version are you running and which plugins do you use?
other than that, the error tells you to look at line 229 of the default-filters.php file, maybe post that line and the line directly before & after it.
Have any changes been made to the server's configuration?
Have you deleted all the wordpress files as when I try to view your blog I get "Index of /" which indicates that some files might have been deleted.