Need an Av button to open another site in a new window

I have this code:

[av_button label='Learn more' link='manually,http://specinvtraining.com' link_target='blank' size='small' position='left' label_display='' title_attr='' icon_select='no' font='entypo-fontello' color='orange' custom_bg='#oooooo' custom_font='#ffffff' av_uid='av-bl0j5' id='' custom_class='' admin_preview_bg='']

But the button open the new website in the same window.

Must need. tweak?

Thanks