In basic link terminology, a backlink is any link received by a web node (web page, directory, website, or top level domain) from another web node. Backlinks are also known as incoming links, inbound links, inlinks, and inward links. first check the anchor text to evaluate how relevant it is to the content on a webpage.
add your site to the webmasters of all three search engines (ie. Bing, Yahoo, and Google) They usually all show different things. I use the SEO checker extension on Chrome. I can't see how there are none showing up considering you have a link in your signature that would constitute a back link.
Submit your site to the search engine and bookmark to the popular social sites. It may help you making some relevant backlinks.
Google lists only quality dofolloe backlinks. If you wanna check all your backlinks, try yahoo or backlinkwatch.
Best tool is yahoo site explorer for checking your links. Google maybe did not index yet your backlinks, just wait or try to ping all your links to help them index quickly.
Better you check with yahoo site explorer to check inbound links count.. Google shows only quality links as a back links.