upgrade wordpress and blugins failed

hey guys i’ve been sufring from hosting problem and till now i get new host for me i install wordpress and upload mysql of old database everything is fine till here .

but today i cant do anything even i make public_html chmod 777
still sa permession denied .

i cant upload it says wrong password to server and im sure is the right one coz i succes to join ftp and cp with it

plkugins also same thing it says upgraid failed or the page stuck and nth change all that make me sucks also

any idea guys how to solve this dammy problem :S

thx in advance