Login password with special characters generates error: "System.ArgumentException Invalid argumen (4295437)

When I connect or login to my database using a password that has special characters in it, I get the error:

Exception: System.ArgumentException
Message : Invalid argument
Stack Trace:
     at IBM.Data.DB2.DB2ConnPool.a(String A_0, d& A_1, b& A_2)
     at IBM.Data.DB2.DB2Connection.set_ConnectionString(String value)
     at IBM.Data.DB2.DB2Connection..ctor(String connectionString)
     at Quest.Toad.DB2.DB2ToadConnection.CreateConnection()
     at Quest.Toad.Db.Connection.AllocConnection()
     at Quest.Toad.Db.Connection.Connect(Boolean notify)
     at Quest.Toad.Db.Provider.BackgroundConnector.CreateBackgroundConnection()