My website is www.rapidsofttechnologies.com...... Its all internal pages are being cache by google. But home page is not .....

Please tell me why. It is not being cache.

Google automatically chooses which pages to cache. To increase your site's visibility in Google, you might want to try Google Webmasters Tool.

Also check your robots.txt to make sure your homepage is not blocking Google from caching.

I am using Google Webmaster tools n checked the robots.txt also it is not blocking the home page. But don't know y home page is not being cached

the code for robots.txt is
User-agent: *
Disallow:

Your home page is being cached. Or at least it is for me with this link:

64.233.183.104/search?q=cache: ...

Sometimes, when Google gets a freshly indexed version of your page, it might not display the "cached" link. Currently, it says it indexed your page 23 hours ago, so perhaps it was fresher than that when you saw it.