Stored Procedure Text Is Not Storing In Database

hi
in my front end i have one text area where user can input his sql statements. for samller data its working. the data type of coulmn is Text in sql server 2005. but problem is when i try to store this data its showing error.i meant not storing data at all. if i cut some of line from this then in this case it stores the data .what should i do to overcome this problem

thanx a lot.

DECLARE @sTemp VARCHAR(10)
DECLARE @nMemberID INT
DECLARE @nPartnerID INT
DECLARE @nDocumentTypeNo INT
DECLARE @nDocumentFormat INT
DECLARE @sEmailAddress VARCHAR(200)
SET @sTemp = '{*MEMBERID*}'
IF UPPER(@sTemp) = 'NULL'
SET @nMemberID = NULL
ELSE
SET @nMemberID = CAST(@sTemp AS INT)
SET @sTemp = '{*PARTNERID*}'
IF UPPER(@sTemp) = 'NULL'
SET @nPartnerID = NULL
ELSE
SET @nPartnerID = CAST(@sTemp AS INT)
SET @sTemp = '{*DOCUMENTTYPENO*}'
IF UPPER(@sTemp) = 'NULL'
SET @nDocumentTypeNo = NULL
ELSE
SET @nDocumentTypeNo = CAST(@sTemp AS INT)
SET @sTemp = '{*DOCUMENTFORMAT*}'
IF UPPER(@sTemp) = 'NULL'
SET @nDocumentFormat = NULL
ELSE
SET @nDocumentFormat = CAST(@sTemp AS INT)
SET @sEmailAddress = '{*EMAILADDRESS*}'
IF EXISTS(SELECT *
FROM ProtocolSettings
WHERE ((@nMemberID IS NULL AND MemberID IS NULL) OR MemberID = @nMemberID)
AND ((@nPartnerID IS NULL AND PartnerID IS NULL) OR PartnerID = @nPartnerID)
AND ((@nDocumentTypeNo IS NULL AND DocumentTypeNo IS NULL) OR DocumentTypeNo = @nDocumentTypeNo)
AND ((@nDocumentFormat IS NULL AND DocumentFormatNo IS NULL) OR DocumentFormatNo = @nDocumentFormat)
AND ProtocolSettingNo = 307)
BEGIN
UPDATE ProtocolSettings
SET SettingValue = @sEmailAddress
WHERE ((@nMemberID IS NULL AND MemberID IS NULL) OR MemberID = @nMemberID)
AND ((@nPartnerID IS NULL AND PartnerID IS NULL) OR PartnerID = @nPartnerID)
AND ((@nDocumentTypeNo IS NULL AND DocumentTypeNo IS NULL) OR DocumentTypeNo = @nDocumentTypeNo)
AND ((@nDocumentFormat IS NULL AND DocumentFormatNo IS NULL) OR DocumentFormatNo = @nDocumentFormat)
AND ProtocolSettingNo = 307
END
ELSE
BEGIN
INSERT INTO ProtocolSettings (ProtocolSettingNo, MemberID, PartnerID, DocumentTypeNo, DocumentFormatNo, SettingValue)
VALUES(307, @nMemberID, @nPartnerID, @nDocumentTypeNo, @nDocumentFormat, @sEmailAddress)
END