IMPORT EXPENSE AND REPORT TROUBLE.

IMPORT EXPENSE AND REPORT TROUBLE.

Once, Ive tried to import the expense and report from another zoho expense account and it works. Now, I'd like to import again but it's totally failed due to :
1. in the "import expense", it says NONE THE ROWS CAN BE IMPORTED, and the trouble is USER DOES NOT EXIST. 

2. in the "import report", it says NONE THE ROWS CAN BE IMPORTED, and the trouble is  There can be only a maximum of 400 rows for each of your entities. Please check and try again.

Please let me know what im doing wrong, because i have done it once and it worked fine. i hope u reply this asap because this is urgent. thankyou.