File _n_=2 and _n_=3 reverting in text file

[Hima]

Data set: Have

P_NAME                     S_NAME                      ALINE_1                    ALINE_2

T1                                S1                                      A1                           D1

T2                                S2                                      A2                           D2

T3                                 S3                                     A3                           D3

Text file: Want

HDRXX XXXXX            20140829

P_NAME                     S_NAME                      ALINE_1                    ALINE_2

T1                                S1                                      A1                           D1

T2                                S2                                      A2                           D2

T3                                 S3                                     A3                           D3

My Code:

DATA _NULL_;
SET HAVE;
FILE "XXXX/want.txt"  lrecl=246;

IF _N_=1 THEN
  PUT @1   'HDR' @4   'XXX XXXXX' @25  "&FILE_DT." @33  213*' ';

IF _N_=2 THEN DO;
  PUT
  @1 'PNAME'
  @31 'SNAME'
  @61 'ALINE_1'
  @91 'ALINE_2'
 
END;

PUT
  @1 PNAME $30.
  @31 SNAME $30.
  @61 ALINE_1 $30.     

  @91 ALINE_2 $30.     ;
RUN;

My output: (line 2 and line 3 must revert)

HDRXX XXXXX            20140829

T1                                S1                                      A1                           D1

P_NAME                     S_NAME                      ALINE_1                    ALINE_2

T2                                S2                                      A2                           D2

T3                                 S3                                     A3                           D3

[Hima · Accepted solution]

I got the solution.