Why Can't I enter recovery?

My phone is xolo era. I rooted it 2 days ago, I also changed the startup animation after rooting, then i thought about having on screen buttons, although i have capacitive physical button of my phone, but still. I tried to get on screen buttons by an app called pimp my rom, after switching on-screen buttons, it asked for a restart, which i did. But after that, when i switch my phone on, just after that it says unfortunately, com.google.androidui has stopped working, when I press ok, it comes again, keeps on coming continuously. I also tried to boot into recovery mode, but xolo sign comes up, again screen becomes black, again xolo sign, again black...............
How can I get my phone into recovery or change the rom by computer?

Please help me.