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>
[download]

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).