Well...
I've replaced worksheet(1) with worksheet(0) (because had data in first worksheet) and replaced $txt->insert with print 'end: ', "$row:$col----$worksheet->{Cells}[$row][$col]->{Val}\n"; statement and got proper results:
c:\d\test>bla.pl Book1.xls
Row, Col = (7, 0)
Value = LWSHI1C
end: 7:0----LWSHI1C
Row, Col = (7, 1)
Value = 900
end: 7:1----900
Row, Col = (7, 3)
Value = 2
end: 7:3----2
Row, Col = (7, 5)
Value = 3
end: 7:5----3
c:\d\test>
What I can advice in that situation is: please make the same corrections in your script and run it in console to make sure you have data in worksheet(1).
