passing Multiple Parameter to Jquery Ajax

Question

I am Using Jquery Ajax in asp.net. I try to pass multiple parameter i am getting this error  [HTTP/1.1 500 Internal Server Error 43ms] and Error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.

 

 

But if i pass a hard coded value it executing perfectly

hard code means i put values instead of variables.