connection string for crystal report

hello.

I am using vs2005, and sql express as back end . I am using crystal report 10.2 .i have designed the report using a stored procedure ,which uses its own connection but i want to force the crystal report to use the connection defined in web.config file ,But Iam unable to do this ..........any help.

and i also want to print the report without showing it in reportviewer ,and on some condition .....as I have 100 records in my database table and i want to print 1 to 50 records by giving the primary id. is this possible to connect the report with a dataset present in .net not by creating typed dataset.