Apr 02, 2014 02:55 AM|Ajay2707|LINK
Crystal Reports runtime is a tool to installed basic dll or say environment in server, because you can not want to installed whole crystal report to server.
So you just download from official site. It is also important to installed proper CR runtime tool as per your visual studio framework (also check for 64 bit / 32 bit) .
For your second answer, you have to given full permission of your temp folder in your application and in your computer to write temporary file of crystal report too.
If you able to change with sql reporting service which comes with visual studio, then good. no tension while deploy.