Minecraft Mods Have Suddenly stopped?

They have stopped working for some reason. They just crash the game. They did work and I don't know why its suddenly stopped. Any Ideas? Its PC version
Repost.

Added (1). I Had
*Mr Crayfish's Furniture mod
*Mo's Creatures
*Dyable Beds
*Custom Mods

Tried to Install
*Copious Dogs
*Jammys Furniture
*The Moon

Whenever I add ANY now It just Crashes

What did I do wrong? Minecraft Mod

I'm new to pc minecraft and I'm trying to install the digimobs mod version 1.7.2. I watched a video and I did the steps(I have forge WinRAR etc.) I made a mods folder and I dragged it from WinRAR to the mods folder. The forge profile is working. The problem is when i start minecraft and i'm on the home it says three mods active when it should say 4(digimobs). I make a world and nothing is there just regular minecraft. I don't know where I went wrong. Me and my friend watched the same video and it worked for him but not me. Heres a link to the video
Please help me

Added (1). plus what are some other mods I should try if I get this one working

Why does industrial craft crash my minecraft 1.7.2?

So I have got mc forge up-to-date and when I put industrial craft into my mods folder it crashes just after the mojang screen. This is what it says…

at cpw.mods.fml.common.LoadController.trans…
at cpw.mods.fml.common.Loader.loadMods(Load…
at cpw.mods.fml.client.FMLClientHandler.beg…
at net.minecraft.client.Minecraft.func_7138…
at net.minecraft.client.Minecraft.func_9999…
at net.minecraft.client.main.Main.main(Sour…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
at sun.reflect.NativeMethodAccessorImpl.inv… Source)
at sun.reflect.DelegatingMethodAccessorImpl… Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launc…
at net.minecraft.launchwrapper.Launch.main(…
Caused by: java.lang.ClassNotFoundException: ic2.common.IC2
at net.minecraft.launchwrapper.LaunchClassL…
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at cpw.mods.fml.common.ModClassLoader.loadC…
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.cons…
at sun.reflect.NativeMethodAccessorImpl.inv… Method)
a

Should I get the Revolt R777 Computer? DETAILS BELOW?

I wanna record games such as MineCraft with Shaders, DayZ, Rust, and Garry's mod.

Added (1). Here are the specs

ntel® i7-4770K Processor
8GB DDR3-1600 High Performance Memory
NVIDIA GeForce® GTX 780 4GB
ASRock B85M-ITX MB
SATA-III 120GB SSD + 1TB 7200rpm HDD
LG Slim Slot Blu-ray Reader
Windows 8.1 + Office 365 Trial

Minecraft Tinker's Constrct Smeltery isn't working?

I just started fittle-farting around with Tinkers Construct today after hearing good things about it. The only problem is when I go to put lava in the seared tank it won't let me. It just places the lava on/above the tank. I tried shift clicking and all sorts of stuff and it's still not working. I know I built the smeltery right because the controller is lighting up like it's supposed to when you built it right. Anyways, anything will help. If for whatever reason we can't figure it out, I'll just re install the mod and see if that works… Thanks!

What are mods in minecraft?

I'm just beginning minecraft and I don't understand the whole Mods thing… And what "forge" is. I understand that mods are things you download into minecraft or something and change your minecraft experience by changing the way blocks look, or adding in natural disasters or whatever… But how do I download mods, is there a site or something to explain what they actually are and how to put them onto minecraft?

What do I need to Upgrade to play high end PC games?

I was just woundering what I need to upgrade in my desktop to play better games with no lag such as Far Cry3 Skyrim minecraft with X512 texturepack and mods saints row 3 & 4 etc…

These are my specs in my computer right now

Processor: Intel(R) Core(TM)2 Quad Cpu Q6600 @2.40ghz
installed memory: 8.00 GB
System Type: 64-Bit operating system/Windows 7
Motherboard type: DDR2
Graphics Card: NVIDIA Quadro FX 1700

on a side note I meet the requirements for skyrim but still lag
on all low settings same with saints row 3