tedster - 7:13 pm on May 10, 2013 (gmt 0)
Hello and welcome to the forums.
Page Rank numbers are only exported to the visible toolbar servers from Google's data a few times a year - usually about four. It's been a long time since they did this, so you need to be patient with any relatively new site right nows. The wait doesn't affect your ranking, however. Google still has a "real" Page Rank number in their back end data that they use to calculate rankings.