Link to table on a web page

Link to table on a web page

A table is updated daily on this page:

http://www.tsp.gov/investmentfunds/shareprice/sharePriceHistory.shtml

...and I wish to update it daily on a spreadsheet.

When I used google sheets, the function is successful when using this formula:

=IMPORTHTML("http://www.tsp.gov/investmentfunds/shareprice/sharePriceHistory.shtml","table",2)

...but when using Zoho Docs, selecting "link external data," and using this URL:
http://www.tsp.gov/investmentfunds/shareprice/sharePriceHistory.shtml

...the message returned is: "No tabular data found in the given URL. Please retry with some other URL."

How do I make Zoho recognize the table?