The problem is, Skeleton and Zombies where "scalable monsters" (one for every size category from Tiny upwards) in 3.0, and have been turned into templates for 3.5.
The spell originally appeared in Magic of Faerûn and later Ghostwalk, 3.0 books, and the 3.5 appearances (LM and Players Guide to Faerûn) where not updated for that change. The PGtF errata says that no summoned undead may have more HD than the caster level +1 (which has its own problems). So, if your caster level is high enough, you could summon a grey render zombie.