Missing access for databases on MS SQL server 2012 database engine

Hi, i have trouble with my MS SQL server 2012 database engine.

I can't access to all databases on server by error:

"Cannot resolve the collation conflict between "SQL_Latin1_General_CP1_CI_AS" and "Cyrillic_General_CI_AS" in the equal to operation"

If i will change collation to Cyrillic_General_CI_AS, then all db would delete from server.