WCF service not returning data

Hi,
I have WCF service which is retriving data from database. From database I am retriving more than 150000+ rows and each row is having atleast 20 columns. When I debug code I can see my response object have 150000+ records however I am not getting records on SOUP UI tool.

I have set maxReceivedMessageSize to 2147483647 but still it is not working.

Note: I am using SOUP UI tool to test response.