CJ Plugin is not importing coupons after a certain number of coupons
I am working on a client's website (he gave me access to his account so I can post question here). I configured the plugin successfully and it imported data into our development website successfully but after importing 626 coupons it stop importing further. I reset the site 5 times (complete reset of database) but plugin stop importing coupons after 626 coupons only. My client joined more than 100 advertisers and these advertisers have more than hundred thousand coupons available. I am unable to locate any error message or error log regarding this. Can anybody suggest me what's wrong and where to start investigation ?
PS: Development site url is http://dev2.infinitcoupons.com/clipper2/