PageRank shows "?" symbol instead of the correct value

Check this out. Try putting the code in my post html.




Here is the code:
<a href="http://www.prchecker.info/" target="_blank">
<img src="http://www.prchecker.info/ttanalysis.blogspot.com-pagerank-3.gif" alt="Checking Page Ranking" border="0" /></a>

Try another one:



<a href="http://www.prchecker.info/" target="_blank">
<img src="http://www.prchecker.info/ttanalysis.blogspot.com-pagerank-2.gif" alt="Checking Page Ranking" border="0" /></a>

Hmm... None of them works..... Kind of sucks.