Erro do JDBC ao ligar-se ao servidor de SQL

Usando a ligação JDBC no meu programa, estou a receber a seguinte excepção. Estou a usar o jdk1. 6. 0_25.

excepção:

com.microsoft.sqlserver.jdbc.TDSChannel enableSSL WARNING: TDSChannel ( ConnectionID:1 TransactionID:0x0000000000000000) SSL handshake failed: RSA premaster secret error com.microsoft.sqlserver.jdbc.SQLServerException: The driver could not establish a secure connection to SQL Server by using Secure Sockets Layer (SSL) encryption. Error: RSA premaster secret error.
at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.TDSChannel.throwSSLConnectionFailed(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.TDSChannel.enableSSL(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.SQLServerConnection.loginWithoutFailover(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown    Source) 
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source)    
at java.sql.DriverManager.getConnection(Unknown Source) 
at java.sql.DriverManager.getConnection(Unknown Source) 
at com.exterro.db.Dummy.main(Dummy.java:22) 
The driver could not establish a secure connection to SQL Server by using Secure Sockets Layer (SSL) encryption. Error: RSA premaster secret error.