Blank Page after when click add to cart and update shopping cart

[imtiaz]

hi every one

My website was hacked , but now i restore with backup but issue is that when i click on the  add to cart it show me blank page or back to home page , Even if i go directly to shopping cart and update some information it again show me blank page.  any help please

Joomla version: 1.5.8
virtuemart: VirtueMart 1.1.7

[aravot]

The best thing is to compare your files with new Joomla and Virtuemart files to make sure the aren't altered.

There is a reason for updates to avoid future hacks please at least update to Joomla 1.5.25 and VirtueMart 1.1.9

[imtiaz]

Thanks  aravot.

Now only one issue remain exit. When i click on the add to cart  it show nothing, (http://www.wbminternational.com/index.php) without index.php at the end it is working fine but with index.php it show error. i am not sure issue with template file or etc. you can check live here

http://www.wbminternational.com

thanks