WordPress MU

i purchased this theme from themeforest:

http://themeforest.net/item/the-clothes-shop-wordpress-ecommerce/64132

it is a wp compatible ecommerce theme.
after activating it thru the theme panel everything goes blank the admin panel as well as website itself.
checked error logs on apache and php both are empty.
i have no idea why this is happening i get a completley white page.
the only way io found to fix this is to rename the theme thru ftp and then everything goes back to normal.
i contacted the author and she said they have no knowledge in wpmu and did not test it for wpmu.

i really need this theme to be used as the main site please help.

thanks in advance

Its obviously doing something hard coded which is breaking WPMU - but quite why your php error log is empty..

Without anything in the error log its hard to start to diagnose and I'm not sure how many people are going to help you fix a theme that you've bought a licence to use and isn't GPL

i will be able to supply theme to whoever can help me diagnose the problem.
but off course the theme will not be for use