I just updated to the new Minecraft 1.4.2, and then updated the 2 mods I have Ironchest, and Forge. So then I went back into my game and finished constructing my new secret opening underground house. So I went to my house to get supplies to furnish my new house. So I went to my house climbed up the ladder to see that all the chests I had from the mod Ironchest was gone all 4 of them. I was freaking out because one of those chests had all my ores i.e my diamonds, that I spent ages mining from branch mining. so i went down underground to my branch mine to check my other chest, because I had a chest that had mainly dirt from the mod too. So I went down there to check it out to see that it was there...

What I expected to happen:
To see my chest in my house to get supplies.

What actually happened was:
All 4 chest disappeared with all of the items in it, except for the one underground.

Please help.