Hi
I have same problem google can not crawl my site i dont know why?

The "sandbox" is not an official google term, it's just a term that everyone else uses to explain why most new sites have problems with the big G. New sites in google don't only have a tough time ranking, they can also not appear for their own company name &/or domain name.

you must check the site structure & check your robots.txt file & make sure it should not have any error.

A 2+ years old site cannot "sandbox"! But the most important, what is your site address?

Do you have a sitemap?, try submitting it again to Google and wait for a day or two then If you still can't find you site on Googloe, maybe it's at the last place on the list of keywords that you are using... Optimize and link build your site so that your rankings will go up and you'll see your site using your choice of keywords...
I don't think that your site is banned or sandbox since you've said that your site was indexed, which means that you are listed on Goolge... or maybe, your robots.txt keeps blocking the spiders that will crawl your site...