I HAVE JUST CHANGED A MERCEDES VITO 2007 CLUCH?

I HAVE JUST CHANGED THE CLUTCH AND WHEN I PUT THE SLAVE CYLINDER BACK IN AND TAKE THE CLAMP OFF THE HOSE THE FLUID IS COMIG BACK OUT OF WHERE IT MEETS THE BEARING, IT HAS A BLACK PLASTIC HOUSING AROUND THE TIP OF THE PIPE AND IS HELD IN PLACE BY A HORSE SHOE CLIP, I HELD THE OLD PART OF THE BEARING IN MY HAND AND CONNECTED IT IN TO IT TO SEE IF IT WAS A PROB WITH JUST THE NEW ONE BUT ITS DOING THE SAME, CAN ANYONE HELP ME OUT PLEASE AND GIVE ME SOME ADVICE??