Re-installed Play Store doesn't work I have a rooted Samsung Galaxy Y GT-S5360, running on Gingerbread 2.3.6. 

I accidentally uninstalled the Google Play Store. I re-installed it and I am able to search for applications on the Play Store, but I'm not able to download them. It shows that Google Play Store (com.process.vending) has stopped working. Once the "Not Responding" message is gone, I am no longer able to search. Is there a way to fix this?
Ensure that the Google Play store is installed as a system application.

Once done, clear the data for the Google Play store, the Google Play Services and the Google Services Framework apps.

Open the Google Play Store (you will get an error, don't worry!).

Reboot, and open the gTalk app. Log in to your gTalk account using the gTalk application (you may have to do it a few times, wait until it says you're online).

Reboot and open the Google Play store again :)