If you downloaded the wallet from the ANN and put those addnodes into extremecoin.conf in %/appdata/roaming/extremecoin The only other thing i can suggest is when you make the conf file you need to click save as, then change it to all files and save extremecoin.conf.
Did you download the wallet from the Yobit coin info ? or from this ANN ? The yobit info points to another coin with a similar name. that wallet won't work with yobit or these addnodes.
The wallet here in this ANN came from a thread on bitcoingarden (which i can no longer find). It looks like someone made this trying to ride on EXC coin popularity and slipped it by Yobit.
I had a copy of the chain from when it stopped and a copy of the windows wallet. i was lucky to google the source on GIT and here we are.
The wallet took from this ANN. And what now if everything is so bad. Where to get a good wallet.