Not able to import Hi end Demo theme

Hi

My web is MobileReadyWorld.com/UAT

Its hosted on Ipage & via Mojo i have purchased your Hi end WP theme.

How ever while importing demo theme, i was getting 500 gateway error.

Then I did database reset & also set the memory to 128MB in WP-config.php file.

Now When tried to again import demo theme, I am getting below error

“””””””””””
Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
“””””””””””

So can you help on this ASAP?

Regards,
Avinash,
MobileReadyWorld.com/UAT