Crystal Report is asking for user credential

Question

i am trying to generate crystal report from more than one table in dataset but its not working,when i have a single table in a dataset then report gets render properly without any iisue but problem comes when i have more than one data table it dataset whether i am using all these data tables or not its gone show me a login window  and when i am passing proper user name and password then also it is redirecting me to the same login page

so i need help regarding,Can any one help me to sort out this issue??

Thanks in Advance