[RESOLVED] Trouble reading + writing files.

I'm having trouble opening and reading files, and also having some trouble writing them.
I'll start with the code for reading, because obviously that comes first

Code for reading:
Sub ReadFile(fileName As String)

Dim stream As StreamReader = New StreamReader(TFTPDir & fileName)
Dim N As Integer = 0
Try
Do
lineRead(N) = stream.ReadLine()
MsgBox(lineRead(N))
N = N + 1
Loop Until lineRead Is Nothing
lines = CInt(N)
N = 0
Catch ex As Exception
MsgBox("Didn't work")
End Try


If fileName = "cal_init*" Then CalFile()
If fileName = "radio_init*" Then RadioFile()
If fileName = "network*" Then NetworkFile()

GenerateFile(lines, fileName)

End Sub
TFTPDIR and fileName are declared earlier in the code.
This code always catches an exception, I'm sure the file is there, but I don't know if theres some sort of initialization I need to do before I try and read it.

Anyone know what's wrong?