[Plugin NextGen Gallery] – Put the album some in quoted by the others (horizont

hello,

sorry for my bad english, but i meet a problem with NextGen Gallery,
on the page where you can see the album, this one are not horizontal but vertical, did you know how can i put them horizontal ?

thank you for your help

PS this is the link who you can see my problem :
https://gillon.jacques.free.fr/?page_id=16