I cant login

i cant login i tried to login and it says
internal exception : java.io.ioexception: not in gzip format

i also have just downloaded a mod called finite water because my bro thought
it was a tsunami mod but i dint think so i mean finite is the opposite of infinite how dat possible a tsunami mod -.-...anyways i got a few other mods but it dint occur before

it happened when i went to the shop and i typed the number i wanted to buy
and i connection lost and internal exception : java.io.ioexception: not in gzip format
pops up.it keeps happening everytime i try to login pls help

did u get an update fo 1.2 or download a new java i thik cause urs might me old other wise idk

any admins or any other staff can tell me how to fix this?

i have solved this problem it was my mod