login fail for user-- help

hi,
i got this error--

Login failed for user 'MERIDIAN\IUSR_BARODA'.
.Net SqlClient Data Provider
---

what should i do?

my connectionstring is
--
conn.ConnectionString = "workstation id=BARODA;packet size=4096;integrated security=SSPI;data source=BARODA\EMIS;persist security info=True;initial catalog=SMS"
--
i also create 'MERIDIAN\IUSR_BARODA' user.

give any solution.
it's urgent.

thanks in advanceThis is a windows account, right? impersonate the web application by supplying the user id and password for the <identity> element in the web.config.

Brian