updated Termbase error

Hi,
I'm a beginner and I created a Termbase through the Glossary Converter app.
At first It worked well. But then I updated the original glossary(excel file), deleted the existing Termbase files and recreated the Termbase.
But unlike before now Trados shows "no results available" in Term Recognition window.
How can I fix it? And is there any way to update the Termbase automatically when I update the excel file?