Here is a chunk of code I found in a blog posting by John Mitchell:

            Dim oUserInfo As New UserInfo
                oUserInfo.PortalID = 0
                oUserInfo.Membership.Username = GetXmlItemValue(xmlItem, "Username")
                oUserInfo.Username = GetXmlItemValue(xmlItem, "Username")
                oUserInfo.Profile.FirstName = GetXmlItemValue(xmlItem, "FirstName")
                oUserInfo.FirstName = GetXmlItemValue(xmlItem, "FirstName")
                oUserInfo.Profile.LastName = GetXmlItemValue(xmlItem, "LastName")
                oUserInfo.LastName = GetXmlItemValue(xmlItem, "LastName")
                oUserInfo.Profile.Unit = GetXmlItemValue(xmlItem, "Unit")
                oUserInfo.Profile.Street = GetXmlItemValue(xmlItem, "Street")
                oUserInfo.Profile.City = GetXmlItemValue(xmlItem, "City")
                oUserInfo.Profile.Region = GetXmlItemValue(xmlItem, "Region")
                oUserInfo.Profile.PostalCode = GetXmlItemValue(xmlItem, "PostalCode")
                oUserInfo.Profile.Country = GetXmlItemValue(xmlItem, "Country")
                oUserInfo.Profile.Telephone = GetXmlItemValue(xmlItem, "Telephone")
                oUserInfo.Membership.Email = GetXmlItemValue(xmlItem, "Email")
                oUserInfo.Email = GetXmlItemValue(xmlItem, "Email")
                oUserInfo.Membership.Approved = True
                oUserInfo.AffiliateID = Null.NullInteger
                oUserInfo.Membership.Password = GetXmlItemValue(xmlItem, "Password")
                Dim createStatus As UserCreateStatus = UserController.CreateUser(oUserInfo)
                If createStatus = UserCreateStatus.Success Then
                    responseBuilder.Append(String.Format("User '{0}' created successfully", oUserInfo.Username))
                Else
                    responseBuilder.Append(String.Format("User '{0}' creation failed: {1}", oUserInfo.Username, [Enum].GetName(GetType(UserCreateStatus), createStatus)))
                End If

Perhaps thinks like PortalID, Email, AffiliateID are necessary ...

Joe,

Thanks for your reply.

As like the sample code, I am also passing all the mandatory fields and user is also created succesfully. But when I attempt to login with this  username and system genrated password, I get the error "Login failed"

Please advice

Uma.

Have you tried using the "Forgot Password" link and using the password that is sent to you?

Yes. I tried forgot password also. Still login fails.

Are you able to login with the Host and Admin accounts?

I am able to login as host and all the registered users logins are working fine.

The only thing is that the user created thru coding is not logging in.

OK, then the problem is in your code that creates the user ... obviously!

If you want to post the entire snippet of code, do that or attach a file. It's hard to debug without being able to see everything.

I am pasting my code to create an user

Dim NewUser As New UserInfo()
NewUser.PortalID = PortalId
NewUser.Membership.Username = tbEmail.Text
NewUser.Username = tbEmail.Text
NewUser.Profile.FirstName = tbFirstName.Text
NewUser.FirstName = tbFirstName.Text
NewUser.Profile.LastName = tbLastName.Text
NewUser.LastName = tbLastName.Text
NewUser.Email = tbEmail.Text
NewUser.Membership.Email = tbEmail.Text
NewUser.DisplayName = tbFirstName.Text &
NewUser.AffiliateID = Null.NullInteger
NewUser.Membership.Approved = True
NewUser.Membership.Password = "password"
Dim createStatus As UserCreateStatus = UserController.CreateUser(NewUser)

If I edit the user's in Admin->User Account, I can able to login successfully.

Please let me know where the problem is.

Thanks
Uma

You might want to look at what is returned by CreateUser.

Also, you say that after editing the user's account, you can login. What do you edit in the user's account to make this happen?

In Admin -> User Account, I have changed the password and logged in with this new password successfuly.

CreateUser() is returning success after inserting the user details into the database.

Login fails only If i try with password that I have given during creating the user.

I have tried both static password and GeneratePassword()

I suggest that you download John Mitchell's tool from here.  Try using it to create a single user.  See if that works.  If it does, then the problem is in your script.  If it fails, then we need to look at your DotNetNuke installation.  This will, at the least, tell us where to look.