Drop Downs and Photoslide not working after upgrading to 2.5

http://prepaidmobileminutes.com/

I cant get the drop down menu to display and the main GK Photoslide image is not working as it just seems to hang. the rest of the site seems to be working fine. any help would be greatly appreciated

I was just about to check the issues for you but couldn't connect to your site because of some problem from server, can you please check if your server is running fine and not blocking IP's from Vietnam?

Thanks,