Previously, 301 can pass pr to a new domain but now, google has canceled this system? I have try to 301 a pr 4 domain to a new domain about 6 month ago but the domain still no any pr...
This is because of the new google panda algorithm. Only bad things happened since they created this algorithm
Maybe Google has some problems in implementing this system. Until now, my blog is still at PR 0 though it has many backlinks
You're far better off building a content site on the pr4 and then linking over to the site you wish to promote. While you don't get as much pr juice that way, the benefit from using your keywords in the link likely outweighs anything you stand to gain via the redirect anyhow.
I don't really agree, maybe the OP needs to wait for the next major PR update to see any effect or update on their redirected domain. For your info, our PR is constantly changing but only at the major updates can we see the snapshots of our current PR status.