Problem Of Inserting In A Nested WHILE Loop In SProc

Hi friends,
 I've been stumped on this for almost a week now.  Everything works in the stored procedure code below except for the 'INSERT INTO @Uppdates' block of code.  I have a SQL Analyzer test driver and when the code gets to the SELECT statement below the INSERT INTO @Updates line the value of the select line is displayed on the screen and nothing gets written to @Updates.  I hope I'm being clear about this.  Any ideas?

 IF @Edit=1 AND LEN(@Changes) > 0
BEGIN
--Split and parse changes
DECLARE @curRec int, @nxtRec int, @Record varchar(8000), @TNum int, @TNam varchar(50), @PDesc varchar(512), @PChk varchar(8), @SNum varchar(12), @NScr varchar(10), @OScr varchar(10),
@curField int, @nxtField int, @curSRec int, @nxtSRec int, @subRec varchar(8000), @curSField int, @nxtSField int

DECLARE @NewProj table (
ProjectID int,
SchoolNumber varchar(20),
ArtTeacherNumber int,
TeacherNumber int,
TeacherName varchar(40),
ProjectDescription varchar(512) NULL,
[Checksum] varchar(20) NULL)

DECLARE @Updates table (
ProjectID int,
StudentNumber varchar(12),
NewScore varchar(10) NULL,
OldScore varchar(10) NULL)

SET @curRec = 1

WHILE @curRec IS NOT NULL
BEGIN
SET @nxtRec = NULLIF(CHARINDEX(CHAR(1), @Changes, @curRec), 0)
SET @Record = SUBSTRING(@Changes, @curRec, ISNULL(@nxtRec,8000)-@curRec) --Extract a class record
SET @curField = 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @TNum = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Teacher Number
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @TNam = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Teacher Name
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(2), @Record, @curField), 0)
SET @PDesc = SUBSTRING(@Record, @curField, ISNULL(@nxtField,1000)-@curField) -- Extract Project Description
SET @curField = @nxtField + 1
SET @nxtField = NULLIF(CHARINDEX(CHAR(3), @Record, @curField), 0)-- Step over existing checksum
SET @PChk = RIGHT('0000000' + dbo.int2base(Checksum(@PDesc),16),8)-- Calculate new checksum based on project description that may have been changed.
SET @curField = @nxtField + 1

INSERT INTO @NewProj (ProjectID, SchoolNumber, ArtTeacherNumber, TeacherNumber, TeacherName, ProjectDescription, [Checksum])
SELECT DISTINCT Students.ProjectID, @SchoolNumber, @ArtTeacherNumber, @TNum, @TNam, @PDesc, @PChk
FROM @Students Students
WHERE Students.SchoolNumber=@SchoolNumber AND Students.TeacherNumber=@TNum

SET @curSRec = 1
WHILE @curSRec IS NOT NULL
BEGIN
SET @nxtSRec = NULLIF(CHARINDEX(CHAR(3), @Record, @curField), 0)
SET @subRec = SUBSTRING(@Record, @curField, ISNULL(@nxtSRec,8000)-@curField) -- Extract a score sub record. Consists of Student Number, new Score, old Score.
SET @curSField = 1
SET @nxtSField = NULLIF(CHARINDEX(CHAR(4), @subRec, @curSField), 0)
SET @SNum = SUBSTRING(@subRec, @curSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract Student Number
SET @curSField = @nxtSField + 1
SET @nxtSField = NULLIF(CHARINDEX(CHAR(4), @subRec, @curSField), 0)
SET @NScr = SUBSTRING(@subRec, @curSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract new Score
SET @curSField = @nxtSField + 1

IF @curSField > LEN(@subRec)
SET @Oscr = NULL-- If no Old Score specified
ELSE
BEGIN
SET @nxtSField = LEN(@subRec) + 1
SET @OScr = SUBSTRING(@subRec, @CurSField, ISNULL(@nxtSField, 1000)-@curSField) -- Extract old Score
END

-- Check for errors
IF ISNUMERIC(@SNum) = 0 OR @NScr IS NULL OR LEN(ISNULL(@PChk,0)) <> 8
BEGIN
SET @UpdateErr = 1
BREAK
END

-- Update the updates table and find ProjectID from existing data table
INSERT INTO @Updates (ProjectID, StudentNumber, NewScore, OldScore)
SELECT DISTINCT Students.ProjectID, @SNum, @NScr, @OScr
FROM @Students Students
WHERE Students.StudentNumber=@SNum

SET @curField = @nxtSRec + 1
SET @curSRec = @nxtSRec + 1
select * from @Updates
END
IF @UpdateErr = 1
BEGIN
BREAK
END
SET @curRec = @nxtRec + 1
END

 Thanks in advance for looking at this,