Cannot Update table when using a Cursor

Hi, I am using a Cursor to parse filepaths. The parsing is working fine but the values aren't being written back to the table. There are no error messages. Can anyone suggest why?

USE [Music ETL] 
go

DECLARE @SlashPos1 AS INT
DECLARE @SlashPos2 AS INT
DECLARE @SlashPos3 AS INT
DECLARE @SlashPos4 AS INT
-- Define the Cursor and what it covers ie the five columns from Transform-Albums ---

DECLARE AlbumCursor CURSOR FOR 
SELECT DirLineNo, AlbumPath, Genre, AlbumArtist, Album
FROM dbo.[Transform-Albums]
FOR UPDATE 

-- Start the Cursor running through the rows-----------------
OPEN AlbumCursor 

-- Declare temporary variables within the Cursor Loop------------
DECLARE @TempDirLineNo AS INT
DECLARE @TempPath varchar(255)
DECLARE @TempGenre varchar(25)
DECLARE @TempAlbumArtist varchar(50)
DECLARE @TempAlbum varchar(255)

-- Perform the first fetch--------------------------------
FETCH NEXT FROM AlbumCursor into @TempDirLineNo, @TempPath, @TempGenre,    @TempAlbumArtist, @TempAlbum

-- Check @@FETCH_STATUS to see if there are any more rows to fetch--------------
WHILE @@FETCH_STATUS = 0 BEGIN 

-- Zeroise the temporary delimiter variable---------------------------- 
SET @SlashPos1 = 0
SET @SlashPos2 = 0
SET @SlashPos3 = 0
SET @SlashPos4 = 0

-- -----Locate delimiters------------------------------------
SET @SlashPos1 = CHARINDEX('\', @TempPath, 1)

IF (@SlashPos1 <> 0)
BEGIN
SET @SlashPos2 = CHARINDEX('\', @TempPath, @SlashPos1 + 1)
END 

IF (@SlashPos2 <> 0)
BEGIN
SET @SlashPos3 = CHARINDEX('\', @TempPath, @SlashPos2 + 1)
END 

IF (@SlashPos3 <> 0)
BEGIN
SET @SlashPos4 = CHARINDEX('\', @TempPath, @SlashPos3 + 1)
END 

-- -----Parse the row ONLY where there an Album Name-----------------------------
IF (@SlashPos4 <> 0 )
BEGIN
SET @TempGenre = SUBSTRING(@TempPath, @SlashPos2 + 1, @SlashPos3 - @SlashPos2 - 1)
SET @TempAlbumArtist = SUBSTRING(@TempPath, @SlashPos3 + 1, @SlashPos4 - @SlashPos3 -    1)
SET @TempAlbum = SUBSTRING(@TempPath, @SlashPos4 + 1, LEN(@TempPath) - @SlashPos4)

-- OUTPUT inserted.genre AS newgenre
PRINT @TempDirLineNo
PRINT @TempGenre
PRINT @TempAlbumArtist
PRINT @TempAlbum
END

-- -----Fetch the next row------------------------------------
FETCH NEXT FROM AlbumCursor into @TempDirLineNo, @TempPath, @TempGenre,    @TempAlbumArtist, @TempAlbum

END 

-- Stop the Cursor running through the rows----------------------
CLOSE AlbumCursor

DEALLOCATE AlbumCursor
GO