My forum's PR gone

[Zagis]

Hello,

I'm running a CMS and a vBulletin in my site and yesterday I installed VBSEO and vBSEO Sitemap Generator for my forums.

Today I've noticed that the PR is 0 for www.mysite.com/forum/ but for www.mysite.com still the same. Both of them had the same PR since yesterday.

Can you please tell my what is happening?

Thanks

[Joe Ward]

Because your URL format has changed, your Google Toolbar PageRank, will not be visible until the next update. These occur about once every 4 months.

Once Google discovers that you're URL has been moved to a new location, it should transfer the old PageRank value to the new addresses.