Hi so from I can see you have a error on your website, this is mostly because of your internet connection so check it and make sure it is ok. The next step will to be to install google chrome if you haven't alreadyy because Firefox seems to have a error with the URL so try again in chrom and hopefully. Tah-Dah!
Hi, looks like your mods are not installed properly! Don't you worry! It wasn't your fault. It looks like there is a old version of optifine downloaded with pixelmon. Download the official pixelmon again after deleting your old one, then f it doesn't come with it download the latest optifine no run it with pixelmon. Ta-Dah!
Hello! So I have two theory's to your problem and I have considered your specs too. Firstly I think that your computer is not ready to handle a modded version of minecraft. I know this because if you have a look at the bottom of all the useful information it says CPUCount. If you don't know this already minecraft recommends that you have atleast a dual core to run minecraft. However even though it is recommened it is not NESSISARY. This has a simple solution. All you have to do is install the 32-bit version of optifine from their website. Then you need to reinstall minecraft with all of your saved worlds and texture packs saved just in case! hen launch the version you want to install and let it run for a bit. In the top left of your screen when you join a world/server you should be able to press f3 and information come up and in the top left it should say 'memory 9%' Or something along that. It doesn't have to be exactly 9%. Wait until that memory gets to around 40-50. To achieve this all you have to do is run minecraft for a while and it should slowly rise. Then exit minecraft and reinstall optifine then Tah-Dah!
Ok, so all you need to do is change the chances to 0.5<=>0.9 all this will do is change the chances slightly higher because since the update what happened is (From what I am being told) To save memory in function they changed it to one decimal place instead of the 3/4 you are trying to change it too. If not you can create another map In survival and find the loot tables there. Edit the values and Tah-Dah!
Solutions to this can be to reinstall minecraft and reinstall all of your mods. Try launching without a texture pack to start off with then Tah-Dah! It should work!