[SOLVED] Installation Problems

I’ve tried to change permissions on these two files with 666, 777, 755 but nothing...i’ve always have this error:

Checking if assets/cache/siteCache.idx.php file is writable: Failed!

Checking if assets/cache/sitePublishing.idx.php file is writable: Failed!

What can i do?

I am on my server with debian..

i have to set execution permissions on assets?

i did it...but nothing... >:(

Ok...ok... my blame...

just a "chmod +x" on assets and cache...and the sun is shining now..