When upgraded from appsrv to wamp, wordpress single pages css gone, why?

Hi, I’ve changed my local testing server (in an old spare notebook) from appsrv to wamp, mainly for php and phpmyadmin latests versions; appsrv only goes to php5.2 and if I wanted to install a new version of phpmyadmin the php version didn’t allow it. So, I uninstalled appserv (installed few months ago, mainly unchanged) and installed wamp; the only thing I did was changing the default server folder, instead of c:/wamp/www now its c:/www; then installed the same version of phpmyadmin my online hosting uses, 4.3 (i think) and everything rolled without problems. Migrated some sites i’ve been working on, and tested them, Ok. cool. So I worked a while on a homepage in wordpress, but when I navigated to a single page, the css was all lost… tried refreshing permalinks, checked the db, the htaccess, the settings on apache, but can’t understand why, when entering a single page the css was all gone, but the data was Ok…