logout from phpmyadmin when create new database (1 reply)

i have strange problem to work with phpmyadmin in Wamp64

i login to phpmyadmin with "root" and no password easily , but when i click on any database or try to create new one suddenly it logout and the weird things is i cant login anymore with the root (no pass ) info

and i get "Cannot log in to the MySQL server" message !

i try to disable antivirus , firewalls , using different Browsers and ...

but no success at all

If i Stop All Services and Enable it again i can login again but the problem still come and cant do anything in phpmyadmin

info :
Windows 7 64bit
WampServer Version 3.0.0 64bit
apahche 2.4.17
mysql 5.7.9
php 5.6.16