how to increase PR for internal pages

Our website's home page http://www.xyz.com/index.php is having a PR 4,

but our internal pages which are directly linked to home page are having PR 0
please suggest me how to increase that (internal pages PR), I have noticed
that Google only crawl our home page not the internal pages, but when I do
site:www.xyz.com in results it shows our all pages.


and our website is not listed in Dmoz also.


Please suggest me the reasons for this and how to check that google has
penalized our website.


Please help in this case.



-hrhk

Check a few things

First is your navigation structure clean.

Second, get more backlinks from higher PR pages. You might be a low PR4 and getting a higher PR4 or a PR5 will help alot.

You have to wait a few updates before PR starts to spread from your homepage to you internal pages. SO be patient and the PR will come....
Hopefully.

I've read somewhere that by using extensive interlinking (where each page links to every other page on your site) has the effect of reducing PR leakage and spreading rank amongst all the pages. It can bring your deeper pages up in rank. The main index page should not do this however. Instead, the index page should link to the main categories of your site. If the index page extensively links to all the pages on your site, you run the risk of bringing the index page rank down.

zoidsoft