macvim - Can't type {} or @ in Vim editors -

im trying start using vim once again, got dead-end. im using portuguese layout keyboard, , can't type curly brackets or @ symbol inside vim.

anyone knows need change have them work normally?

update: barton points out, should have provide more complete information, here goes:

when type alt+2 (in keyboard it's how type @) 2 exponent symbol.

for curly brackets type alt+shift+8 / 9, gives me { , }, in vim shows small quote symbol , © symbol.

when run :abbreviate command "no abbreviation found".

update2: i've noticed on iterm can type symbols in vim mode, not on vim gui's.

thanks help.

finally discovered causing problems:

set macmeta 

it wasn't easy catch one.