[tproxy] Patch errors on vanilla kernels?

Hi, Applying the patches on my system fails. I've tried several different versions: cttproxy-2.4.25-1.2.0 on a vanilla Linux 2.4.25 kernel cttproxy-2.4.25-1.9.3 on a vanilla Linux 2.4.25 kernel cttproxy-2.6.3-1.9.2 on a vanilla Linux 2.6.3 kernel cttproxy-2.6.5-1.9.3 on a vanilla Linux 2.6.3 kernel All patches fail. The best option is cttproxy-2.4.25-1.2.0, which only generates one error, that may possibly be fixed by hand (ip_contrack.h). The worst option is cttproxy-2.6.5-1.9.3, which generates dozens of errors. Do you use pre-patched (red hat, suse) kernels or something? I don't know what else could have caused these problems. Does anyone know this problem?