Youtube stopped working in my iphone 4....?

hey frnds....i bought an iphone 4 a month back and its doing gud till now but a day back you tube stopped working....i tried to open in safari and nothing is showing up...just a white screen is appearing....do u have any idea regarding this dudes....really its very boring without youtube in my iphone....i couldn't get wat could be the problem....recently the youtube stopped working....plzz help me with ur ideas and solutions frndss.....waiting for the reply....thnksss....