Facing problem in Web Scraping

i want to scrap product title and link from Amazon.I did data scraping in this way

i also make the selector of attach browser Dynamic.
After data scraping i write the output of data scraping(result) in an excel.It give proper result in excel for 2 to 3 days.After 2 to 3 days data scraping performed but got empty result in excel.
how can i solve this issue?