It works at my end..
redis 127.0.0.1:6379> sadd out2 judy_1
(integer) 1
redis 127.0.0.1:6379> zadd dataseet 118903 judy_4
(integer) 1
redis 127.0.0.1:6379> zadd dataseet 137967 judy_1
(integer) 1
redis 127.0.0.1:6379> zrange dataseet 0 -1 withscores
1) "judy_4"
2) "118903"
3) "judy_1"
4) "137967"
redis 127.0.0.1:6379> zinterstore result 2 out2 dataseet
ZRANGE result 0 -1
1) "judy_1"
which version you are using?