checksum Problem
 

Hi there I installed apt along with synaptic but when I update the software available or press Reload I get a bunch of errors

fc4-i386/redhat/base/pkglist.updates-legacy
W: Release file did not contain checksum information for http://dl.atrpms.net/fc4-i386/redhat...updates-legacy
W: Release file did not contain checksum information for http://dl.atrpms.net/fc4-i386/redhat...testing-legacy
W: Release file did not contain checksum information for http://dl.atrpms.net/fc4-i386/redhat...testing-legacy

Does anyone no if this is something I can fix like adding "gpgkeys" 4 example or is this totally different?

I want to add that I googled 4 a answer but the term "checksum" only seems to be related to md5 verification with ISO's etc not for repositories it seems which is why I decided to ask about this.
AnyWay I clicked on the Repositories I have problems with & they all say the requested url is not found ,so seems like their useless anyway? THANKS