Error Related To IF Statement In Query

I'm having trouble getting a query to run that contains an IF statement:
*****************************************
DECLARE @lid int, @ptf varchar(50)
SET @lid = 3
set @ptf = '05-00005'

SELECT
tblInfoData.PTFileNumber AS [PT File Number],

IF @lid > 3
BEGIN
tblInfoData.OrigGrantor AS [Original Grantor],
END


tblPropertyData.propStreet AS [Property Address],
tblPropertyData.propCity AS City,
tblPropertyData.propState AS State,
tblPropertyData.propZip AS Zip,
tblSaleData.OrigSaleDate AS [Original Sale Date],
tblInfoData.Status AS Status
FROM tblInfoData INNER JOIN
tblPropertyData ON tblInfoData.PTFileNumber = tblPropertyData.PTFileNumber INNER JOIN
tblSaleData ON tblInfoData.PTFileNumber = tblSaleData.PTFileNumber
WHERE CONTAINS(tblInfoData.PTFileNumber, @ptf)


*********************************************

This throws the following error in Query Analyser:

Server: Msg 156, Level 15, State 1, Line 12
Incorrect syntax near the keyword 'IF'.
Server: Msg 170, Level 15, State 1, Line 14
Line 14: Incorrect syntax near 'tblInfoData'.

Any help/ideas?

thanx
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