Error while importing user list in MII

Hi,

I am importing  a user list txt file in Identity Management with the foll. syntax-

[User]uid=miiusernamelast_name=lastnamePassword=passwordaccessibility=0SAPOEE:DEFAULT PLANT=ABCDSAPOEE:DEFAULT CLIENT=xxxgroup=groupname;

However, I am getting the foll. error while uploading-

"Error. Last name must be specified" (I am specifying the last_name as above)

Can someone please assist?

Thanks

Rajeev