please check path you have given of crystal report
and do as following it might help you
copy your rpt files from your project and make one folder of name rpt in client pc on c drive and do followingin app.config file
<add key ="rptpath" value ="C:\\rpt"/>;
and do on form on which you are showing report
rptpath = ConfigurationManager.AppSettings["rptpath"] + "\\" +"your report.rpt";
obj.Load(rptpath)
before doing all above things right click on crystal report from solution explorer and and set property copy to output directory to copy always