Google SE
 

I submitted site my site to most of the popular search engines like google, yahoo, msn etc. All the search engines indexed my site (bdunit.com) apart from google. could any one please tell me why that could be happened and how would i solve this issue.

Dunno, we aren't google and can't answer for them.

You're Meta description is really long and rather spammy, doesn't make much sense, contains a ton of characters, try fixing that to start.

After that, start getting some links going back to your site, that you know are indexed in google. Even placing your site link in your signautre at all the forums you visit will help some.

If Google is just having problems with crawling your site, you can create a Sitemap(modification available for free here), and signing up for a google webmasters account, and then waiting a few days and seeing if it gives you any errors.

I tried the Site Map from here and I get errors. It says it's not in the valid format.

i have reduced my meta description, thanks for your advice. but do you think it could be happen because so many forum links on main page?

Make sure you did the .htaccess file edit as well