Fixed hand brake light, flashing stop

Hello good afternoon, I always enter the forum and so far I had not needed your help, since with the responses you are giving it has gone great. Now I have a problem with my 307 and I have tried several things and I can't solve the problem. I tell you.
I have a Peugeot 307 XS 1.6 Gasoline of 2001, started marking ABS light, the days also marked the hand brake light, stop flashing and on the insufficient level message of brake liquid. We have changed the ABS block, and the ABS light has turned off, we have changed the brake fluid and purged, and the hand brake light and the insufficient level message ... it does not leave. Someone could guide me where the failure can come. thank you so much.