Hello, I can't put boxes of sleeping bags etc. on my server, only after a certain time and only for a few seconds and then it doesn't work again. Can anyone help me?

Do you have any plugins which might be related to such behaviour? 

*AdminPanel
*betterChat
*GatherManager
*InfoPanel
*PermissionsManager
*QuickSmelt
*TimeOfDay
*UnburnableMeat

Does it just "not work" or maybe its shown as red and such?