Can't create users with custom ID

Trying to upload a list of 1400 users that must have a custom ID associated with each. When i try to upload, it states the error:

“userid ‘1686’ is not present in the DB and the username [edited out] is not present in the DB (line 2)”

And nothing imports…

This is what my csv setup looks like:

http://www.filefactory.com/file/50qon9wc1wgl/n/contacts-edited4_csv

Any help would be great!!

http://ww.wp.xz.cn/plugins/cimy-user-manager/