Disable K2 component and enble slideshow module in the same position

Hello, i wish to disable the K2 component and enable a slideshow module in the same position, but when i try to view the slideahow the size of the images change every time , also if i put all images with the same dimension. I now that the template is rsponsive but i not understand who change the size of the slideshow view on every change of the image ?

Is possible the CSS of the template ?

How can i disable it to leave the size of the image slideshow not change every time ?

Please help me to resolve it, or suggest how i can use k2 only for simple imge slideshow without text or other.

Thank you. Bye

Can you show me your site url here ?

Regards