error while check out

Hi
It is error in stylesheet because you created some file and folder which override default css and templates.
I renamed /public_html/mobilespares.in/app/design/frontend/default/default/template/checkout => _checkout and re-copy /public_html/mobilespares.in/app/design/frontend/default/jm_morganite/template/checkout/onepage.phtml then now it is running well.

No the problem still persists. It allows to go to the checkout page first time, then after selecting shiiping method, it goes back to the shopping cart page. And if now we do proceed for checkout we get error.
For trying again we have to clear cache. But trying again repeats the same thing. I think some problem in shipping. Request you to try the complete checkout.

You rigtly mentioned, I had installed quick one page check out module. But the problem was also coming prior to installing this module.

Hello.
I’ve just done as I did in previous time:
1. renamed /public_html/mobilespares.in/app/design/frontend/default/default/template/checkout => _checkout
2. re-copy /public_html/mobilespares.in/app/design/frontend/default/jm_morganite/template/checkout/onepage.phtml
then it is running well.
I completed the order some product (you can see in Admin->Sales->Orders)