I'm really sorry because I re-opened this discussion.
My client (a charity foundation) use namesco and zeus.
I follow the solution provided by thestealthyfox
"I was creating the rewrite script in notepad then changing to a script file in the ftp which didn't work. I have however just created it in text wrangler and saved it straight away as rewrite.script.
Used the coding on this site: http://www.niallflynn.com/seo-news/register-365-wordpress-permalinks/ "
But the website is still down (with page).
I tried to delete rewrite.script and re-upload but nothing happened.
I need some help in order to fix this problem.
blueklein76 Could you explain step by step how to fix the problem with permalinks?
I read this: "Finally in desperation I tried a different permalink - and it worked! Hmm. So I went back to the previous permalink and added a short query string on the end along the lines of "?nocache=1" - and then it too sprang into life."
but I didn't understand, sorry.
Many thanks in advance for help