Hi Ghulam
If you have cleared the infection and you are positive of it, then you should follow these instructions to get you off their hit list: https://support.google.com/webmasters/answer/2600725?hl=en
Here is some information on what you can expect on the process of getting it removed: http://blog.sucuri.net/2011/12/ask-sucuri-how-long-it-takes-for-a-site-to-be-removed-from-googles-blacklist-updated.html
This article will likely help you as well: http://blog.sucuri.net/2012/07/google-blacklist-warning-somethings-not-right-here.html
Thanks