crystal report and oracle connection using asp.net (web application)

hi, I am trying to connect with ORACLE database using asp.net 3.5 for displaying Crystal Report. I used the code

cr.SetDatabaseLogon("userid", "password", "localhost", "dbName")

error message:

Logon failed. Details: ADO Error Code: 0x Source: OraOLEDB Description: ORA-01005: null password given; logon denied Native Error:  Error in File C:\Users\ASUS\AppData\Local\Temp\ListOfProduct {43AB9328-CC1F-47C9-A76D-3998F68E0128}.rpt: Unable to connect: incorrect log on parameters.

 Can someone please mention, how to solve the problem

Thanks