don't listen to everyone that posts a response. if your site is new then it might take awhile to show PR... as much as 4-6 months. Google is slow to say the least. keep watching your back links by checking link pop... there are many online tools to check link pop including the one on my site (
Link Pop Check). Alternatively, you should use a tool that checks that your link trades are still linking to you (recip checking). I have one available for sale on my site and there are a few free ones available (I can't remember their names but there is a current thread about it on this forum). You can also check Alexa Rank, Links and PageRank for multiple urls using
my Bulk Alexa Check tool. The Link Pop and Alexa Check are free tools that anyone can use.