When I'm trying to log in to a server via FTPS with Filezilla I get
these FTP messages from the server:

Response:   220-This is a private system - No anonymous login
Response:   220 You will be disconnected after 60 minutes of inactivity.
Command:    AUTH TLS
Response:   234 AUTH TLS OK.
Status: Initializing TLS...
Error:  GnuTLS error -50: The request is invalid.
Error:  Failed to initialize TLS.
Error:  Could not connect to server

It worked great before on Fedora 14/Filezilla. But now I'm using
Scientific-Linux with Filezilla (I reinstalled my PC from Fedora to
Scientific Linu), and it gives this. What am I missing?

I installed Scientific Linux as a "Normal Desktop" from the 64bit DVD:

[user@pc ~]$ lsb_release -a
LSB Version:
:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID:    Scientific
Description:    Scientific Linux release 6.1 (Carbon)
Release:    6.1
Codename:    Carbon
[g@a ~]$ rpm -qa | egrep -i "filezilla|gnutls"
gnutls-2.8.5-4.el6.x86_64
[user@pc ~]$


I downloaded Filezilla from here (FileZilla_3.5.3_x86_64-linux-gnu.tar.bz2):

http://filezilla-project.org/download.php?type=client

because I didn't find it in the repositories.

Does anybody knows why do I get this answer? I mean what is the
solution to make it work? (again: connection worked with Fedora 14 on
the same day.)

Thank you!