can't login to sql server after i've installed a self made certificate

hello,
i've made a self signed ssl certificate with selfcert, but now i can'tlogin into sql server: i get this error:


The connection with the server was set correctly, but then there was an error during the handshake pre-login. (provider: Provider shared memory, error: 0 - No other process on the other end of pipe.) (Microsoft SQL Server, Error: 233)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=233&LinkId=20476

I've tryed almost everyting but have found no solution:
i disabled via protocol
checked if remote conn was enabled
selected trust certificate (in sq lconfiguration manager)
removed my certificate
uninstalled selfcert
and so on