Game Mechanics: Can't loot corpse

[choklo]

I started a necro Saturday and had several times where I could not loot my corpse. I relogged and it worked until that night. I relogged to desktop 3 times and no luck. I then rebooted my pc and still no luck. I get the error,"You may not loot that corpse at this time."
I gave up after that. The char's name is rhik, a DE necro in nek forest. I'm camped next to the unlooted corpse.