Insert Permission Is Denied

I've a data access code as below to insert two data into my sql server db. but there is an error occur. which permission is denied.

before this i'd tried to read data from the dataase, it doesn't has any permission denied.

Public Function newRegister(ByVal uName As String, ByVal uPass As String) As Boolean

Dim valid As Boolean = False

If findMember(uName) = False Then

conRegister.Open()Dim sqlCmd As System.Data.SqlClient.SqlCommand = conRegister.CreateCommand()

sqlCmd.CommandType = CommandType.Text

sqlCmd.CommandText = "Insert into Logon (UserName, Password) Values(@UserName, @Password)"sqlCmd.Parameters.AddWithValue("@UserName", uName)

sqlCmd.Parameters.AddWithValue("@Password", uPass)

 

sqlCmd.ExecuteNonQuery()

conRegister.Close()

valid = True

End IfReturn valid

End Function

 

Please help. 10x.