Debian Squeeze repositories not accessible

Hi! I've just upgraded my Debian Lenny install to Debian Squeeze (I used dist-upgrade). Trinity seems to run fine, but I tried to change sources.list to the repositories given for Squeeze: For Squeeze [STABLE] (4 lines): deb http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity/debian squeeze main deb-src http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity/debian squeeze main deb http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps/debian squeeze main deb-src http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps/debian squeeze main These (as well as the GPG Key address) only give timeouts. Server down, or deprecated info? If I had trinity 3.5.12 running on Lenny and it still runs on Squeeze, should I actually "update" at all? Thanks for information, Thierry