[Openswan Users] openswan error

[Luis Figueredo - HSBS]

Ding this at linux redhat 7.3: 
   rpm -ivh openswan-2.1.5-1rh7.i386.rpm

it returns this message: 
error: failed dependencies
        ipsec-tools is needed for openswan-2.1.5-1fc2

I dont undestand because the ackage i try to intall is    openswan-2.1.5-1rh7.i386.rpm and the error message is about  openswan-2.1.5-1fc2 which is openswan for fedora core 2. Well, moreover i need nat-t suport, my question is: I just need to install the rpm or i need to do something with the kernel.

                                           Thanks in advance 
                                                                              Luis