SuSEFirewall-Masq and ipchains with 2.4.x

Hi, boot.msg when initializing SuSEFirewall: "WARNING: FTP/IRC/REALAUDIO etc. masquerading does not work with ipchains and the 2.4. kernel. Either move to a stable 2.2 or use SuSEFirewall2" I did change to SuSEFirewall2 at SuSE-FTP-update7.3. Install OK. Kernel 2.4.4. But the error-msg appears at least. What's wrong? Thanks 4 help, René