Adding a new user to existing LDAP group

We already have a created LDAP Database with multiple groups and users.Now I want to add  a new user and assign him to existing group

I have created a newuser.ldif  file as follows

dn: uid=test,ou=people,dc=crmsldap,dc=agilent changetype: add objectClass: top objectClass: person objectClass: organizationalPerson objectClass: inetOrgPerson objectClass: posixAccount objectClass: shadowAccount cn:  test sn:  test uid: test userPassword: test uidNumber: 10000 gidNumber: 300 homeDirectory: /home/test

dn: cn=admin,ou=groups,dc=crmsldap,dc=agilent changetype: modify memberUid: test

When I run the script

/opt/symas/bin/ldapmodify -x -D "cn=Manager,dc=crmsldap,dc=agilent" -W -f newuser.ldif it gives an error as follows

ldapmodify: modify operation type is missing at line 21, entry "cn=admin,ou=groups,dc=crmsldap,dc=agilent"

Thanks Subbarao