Slam did not work on magical creatures until December 1999. After this, you could equip magical shoulders and it would hit the mob.
Source:
	Quote:
	
	
		| Povarian posted December 01, 1999 06:51 AM
 
 Please post a status on this BUG. I and my whole group died again in CT cuz I was unable to SLAM the steel golem, while wearing my crafted gloves (magic) and wielding my Exec Axe (2hander magic).
 Thank You
 
 A True Warrior who will not settle for using 1handers to fight, mes love mes axe and mes wanna use it all da time!!!!
 
 ---
 
 Robert Hill
 posted December 07, 1999 05:01 PM
 
 This has been fixed on the Test Server. It be necessary to have a magical item equipped on characters shoulder to achieve a slam on magical creatures. This should be updated on Wed. Dec. 8.
 
 Robert Hill
 Lead Tester
 EverQuest
 
 http://web.archive.org/web/200004110...ML/000016.html
 | 
	
 Verant was using the DrTwister.com forums as an informal bug source for a few months in 99.
Edit: Here's Rob Hill today, because I'm creepy: 
http://www.gamesauce.biz/tag/robert-hill/
Fix is corroborated in patch notes for Dec 8th 1999: