Theme Uploading Problem..!!

Dear All,

I am a newbie to wordpress. Running my own business and needed a website for the purpose. Made a very basic one but its lacking a spark so i decided to go off for a better one. I downloaded this theme “Crystalline 10” which is 43 mb in size but when ever i try to upload it, it wont upload. it uploads around 2% and then screen goes “webpage isnt available”. i have been trying to upload it for quite some days now but no success. Your help would be highly appreiated if you can help me out in uploading/ troubleshooting the problems. Thanks

A noob