Hi,
The following bug seems to match [
https://issues.apache.org/bugzilla/
show_bug.cgi?id=14493] your problem.
Most of the responses in the bug report suggest that the Excel file
isn't really a proper Excel file.
* Open the file in a text editor (like notepad on windows) to confirm
that it is a true ".xls" file.
Some other questions:
* What version of Excel created the file?
* Can you create a very simple Excel file and read it?
David.