"We offer new support options and therefor the forums are now in read-only mode! Please check out our Support Center for more information." - Vuforia Engine Team

Vuforia play error in uniity 5

Hello, i am new to unity and vuforia. i had build a Augmented reality app with unity and vuforia extensions, but when try to run it nothing appears except a blank screen.

i had seen in camera options that an error occured that "error in vuforia play mode"and also "no profiles were detected for your web cam".. what to do..????

Attachment