ASP.NET problem. What does this error mean and how do i fix it?

[The Doctor]

Ok i am making a project in ASP.Net. For this part of the code, all i want to do is read in a CSV text file into a dynamic array. Now it used to work, but now i dunno why it doesnt.

Dim stemp As String
Dim atemp() As String
Dim forename, surname, form, year, username, password As New ArrayList
Dim NoOfAccounts As Integer
FileOpen(1, "Chem-Mystery\StudentLogin.txt", OpenMode.Input)

NoOfAccounts = 0
While Not EOF(1)
stemp = LineInput(1)
atemp = stemp.Split(",")

forename(NoOfAccounts).Add = atemp(0)
surname(NoOfAccounts).Add = atemp(1)
form(NoOfAccounts).Add = atemp(2)
year(NoOfAccounts).Add = atemp(3)
username(NoOfAccounts).Add = atemp(4)
password(NoOfAccounts).Add = atemp(5)

NoOfAccounts = NoOfAccounts + 1

End While
FileClose(1)

It crashes on forename(NoOfAccounts) = atemp(0) when NoOfAccounts = 0, so when the While loop first begins. Also, it is reading the text file correctly, and splitting the 6 fields correctly as well. The error says:
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

Most Forums have been unhelpful. Can you please Help.

THanks