i have a problem with knights

[jlskelin]

so on my server palaadin druid and soc works with spells but when knight use a spells its crashes wthas wrong do i need to fix that in spells or what ?

 

[Limos]

Which server do you use, what is the ml of this knight, do you also have this problem when you create a new knight character or when you change for example a paladin to a knight?
Any specific spells or all spells?