Purchased PR3 Domains
- SEO |

I recently bought a couple of expired PR3 domains, as soon as I changed hosting and loaded up a Word Press script within a few hours the went to PR0. I did all the check for fake PR etc before I bought them and all seemed okay.
They were not expensive or anything, but it's a little annoying. Any ideas why this happens from the experts out there for future ref ?
I was always under the impression page rank is done every few months and not overnight ?
Good Day People! This is my fav search engine: Google